diff --git a/init/Android.bp b/init/Android.bp
index ed1f148..8f1ca3d 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -38,7 +38,6 @@
     "capabilities.cpp",
     "epoll.cpp",
     "import_parser.cpp",
-    "interface_utils.cpp",
     "interprocess_fifo.cpp",
     "keychords.cpp",
     "parser.cpp",
@@ -88,6 +87,7 @@
 init_host_sources = [
     "check_builtins.cpp",
     "host_import_parser.cpp",
+    "interface_utils.cpp",
 ]
 
 soong_config_module_type {
@@ -190,7 +190,6 @@
         "libext4_utils",
         "libfs_mgr",
         "libgsi",
-        "libhidl-gen-utils",
         "liblog",
         "liblogwrap",
         "liblp",
diff --git a/init/host_init_verifier.cpp b/init/host_init_verifier.cpp
index 52be0a1..287857a 100644
--- a/init/host_init_verifier.cpp
+++ b/init/host_init_verifier.cpp
@@ -297,8 +297,7 @@
     ActionManager& am = ActionManager::GetInstance();
     ServiceList& sl = ServiceList::GetInstance();
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&sl, GetSubcontext(), std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&sl, GetSubcontext()));
     parser.AddSectionParser("on", std::make_unique<ActionParser>(&am, GetSubcontext()));
     parser.AddSectionParser("import", std::make_unique<HostImportParser>());
 
diff --git a/init/init.cpp b/init/init.cpp
index 4878660..6c80899 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -268,8 +268,8 @@
 Parser CreateParser(ActionManager& action_manager, ServiceList& service_list) {
     Parser parser;
 
-    parser.AddSectionParser("service", std::make_unique<ServiceParser>(
-                                               &service_list, GetSubcontext(), std::nullopt));
+    parser.AddSectionParser("service",
+                            std::make_unique<ServiceParser>(&service_list, GetSubcontext()));
     parser.AddSectionParser("on", std::make_unique<ActionParser>(&action_manager, GetSubcontext()));
     parser.AddSectionParser("import", std::make_unique<ImportParser>(&parser));
 
@@ -324,9 +324,7 @@
         }
     }
 #endif  // RECOVERY
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&service_list, subcontext,
-                            std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&service_list, subcontext));
     parser.AddSectionParser("on", std::make_unique<ActionParser>(&action_manager, subcontext));
 
     return parser;
diff --git a/init/init_test.cpp b/init/init_test.cpp
index 5088273..f280de9 100644
--- a/init/init_test.cpp
+++ b/init/init_test.cpp
@@ -62,8 +62,7 @@
     Action::set_function_map(&test_function_map);
 
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(service_list, nullptr, std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(service_list, nullptr));
     parser.AddSectionParser("on", std::make_unique<ActionParser>(action_manager, nullptr));
     parser.AddSectionParser("import", std::make_unique<ImportParser>(&parser));
 
@@ -625,8 +624,7 @@
 
     ServiceList service_list;
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&service_list, nullptr, std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&service_list, nullptr));
 
     ASSERT_TRUE(parser.ParseConfig(tf.path));
 
@@ -657,8 +655,7 @@
 
     ServiceList service_list;
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&service_list, nullptr, std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&service_list, nullptr));
 
     ASSERT_TRUE(parser.ParseConfig(tf.path));
     ASSERT_EQ(1u, parser.parse_error_count());
diff --git a/init/reboot_test.cpp b/init/reboot_test.cpp
index b3d038d..b7a1cfd 100644
--- a/init/reboot_test.cpp
+++ b/init/reboot_test.cpp
@@ -103,8 +103,7 @@
                                        "$selabel", GetSecurityContext(), false);
     ServiceList& service_list = ServiceList::GetInstance();
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&service_list, nullptr, std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&service_list, nullptr));
 
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
diff --git a/init/service_parser.cpp b/init/service_parser.cpp
index 6781c70..e6f3af6 100644
--- a/init/service_parser.cpp
+++ b/init/service_parser.cpp
@@ -27,7 +27,6 @@
 #include <android-base/parseint.h>
 #include <android-base/properties.h>
 #include <android-base/strings.h>
-#include <hidl-util/FQName.h>
 #include <processgroup/processgroup.h>
 #include <system/thread_defs.h>
 
@@ -201,24 +200,6 @@
 Result<void> ServiceParser::ParseInterface(std::vector<std::string>&& args) {
     const std::string& interface_name = args[1];
     const std::string& instance_name = args[2];
-
-    // AIDL services don't use fully qualified names and instead just use "interface aidl <name>"
-    if (interface_name != "aidl") {
-        FQName fq_name;
-        if (!FQName::parse(interface_name, &fq_name)) {
-            return Error() << "Invalid fully-qualified name for interface '" << interface_name
-                           << "'";
-        }
-
-        if (!fq_name.isFullyQualified()) {
-            return Error() << "Interface name not fully-qualified '" << interface_name << "'";
-        }
-
-        if (fq_name.isValidValueName()) {
-            return Error() << "Interface name must not be a value name '" << interface_name << "'";
-        }
-    }
-
     const std::string fullname = interface_name + "/" + instance_name;
 
     for (const auto& svc : *service_list_) {
@@ -702,14 +683,6 @@
         }
     }
 
-    if (interface_inheritance_hierarchy_) {
-        if (const auto& check_hierarchy_result = CheckInterfaceInheritanceHierarchy(
-                    service_->interfaces(), *interface_inheritance_hierarchy_);
-            !check_hierarchy_result.ok()) {
-            return Error() << check_hierarchy_result.error();
-        }
-    }
-
     if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__) {
         if ((service_->flags() & SVC_CRITICAL) != 0 && (service_->flags() & SVC_ONESHOT) != 0) {
             return Error() << "service '" << service_->name()
diff --git a/init/service_parser.h b/init/service_parser.h
index 670a5c6..f06cfc4 100644
--- a/init/service_parser.h
+++ b/init/service_parser.h
@@ -18,7 +18,6 @@
 
 #include <vector>
 
-#include "interface_utils.h"
 #include "parser.h"
 #include "service.h"
 #include "service_list.h"
@@ -29,13 +28,8 @@
 
 class ServiceParser : public SectionParser {
   public:
-    ServiceParser(
-            ServiceList* service_list, Subcontext* subcontext,
-            const std::optional<InterfaceInheritanceHierarchyMap>& interface_inheritance_hierarchy)
-        : service_list_(service_list),
-          subcontext_(subcontext),
-          interface_inheritance_hierarchy_(interface_inheritance_hierarchy),
-          service_(nullptr) {}
+    ServiceParser(ServiceList* service_list, Subcontext* subcontext)
+        : service_list_(service_list), subcontext_(subcontext), service_(nullptr) {}
     Result<void> ParseSection(std::vector<std::string>&& args, const std::string& filename,
                               int line) override;
     Result<void> ParseLineSection(std::vector<std::string>&& args, int line) override;
@@ -88,7 +82,6 @@
 
     ServiceList* service_list_;
     Subcontext* subcontext_;
-    std::optional<InterfaceInheritanceHierarchyMap> interface_inheritance_hierarchy_;
     std::unique_ptr<Service> service_;
     std::string filename_;
 };
diff --git a/init/service_test.cpp b/init/service_test.cpp
index a3590b5..53b53ed 100644
--- a/init/service_test.cpp
+++ b/init/service_test.cpp
@@ -253,8 +253,7 @@
                                        "$selabel", GetSecurityContext(), false);
     ServiceList& service_list = ServiceList::GetInstance();
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&service_list, nullptr, std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&service_list, nullptr));
 
     TemporaryFile tf;
     ASSERT_GE(tf.fd, 0);
diff --git a/init/test_utils/service_utils.cpp b/init/test_utils/service_utils.cpp
index 6426ed9..7002a67 100644
--- a/init/test_utils/service_utils.cpp
+++ b/init/test_utils/service_utils.cpp
@@ -30,8 +30,7 @@
 android::base::Result<ServiceInterfacesMap> GetOnDeviceServiceInterfacesMap() {
     ServiceList& service_list = ServiceList::GetInstance();
     Parser parser;
-    parser.AddSectionParser("service",
-                            std::make_unique<ServiceParser>(&service_list, nullptr, std::nullopt));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&service_list, nullptr));
     for (const auto& location : {
                  "/init.rc",
                  "/system/etc/init",