Soong: remove obsolete proto lib from unit test

Bug: b/321077378
Test: m and avd
Change-Id: Ib121da201e0be38d1acd82de1487f6cfba9e696c
diff --git a/apex/aconfig_test.go b/apex/aconfig_test.go
index 726041c..14c0b63 100644
--- a/apex/aconfig_test.go
+++ b/apex/aconfig_test.go
@@ -23,6 +23,7 @@
 	"android/soong/genrule"
 	"android/soong/java"
 	"android/soong/rust"
+
 	"github.com/google/blueprint/proptools"
 )
 
@@ -173,10 +174,6 @@
 					name: "libaconfig_storage_read_api_cc",
 					srcs: ["libaconfig_storage_read_api_cc.cc"],
 				}
-				cc_library {
-					name: "libaconfig_storage_protos_cc",
-					srcs: ["libaconfig_storage_protos_cc.cc"],
-				}
 				aconfig_declarations {
 					name: "my_aconfig_declarations_bar",
 					package: "com.example.package",
@@ -436,10 +433,6 @@
 					name: "libaconfig_storage_read_api_cc",
 					srcs: ["libaconfig_storage_read_api_cc.cc"],
 				}
-				cc_library {
-					name: "libaconfig_storage_protos_cc",
-					srcs: ["libaconfig_storage_protos_cc.cc"],
-				}
 				aconfig_declarations {
 					name: "my_aconfig_declarations_foo",
 					package: "com.example.package",
@@ -501,10 +494,6 @@
 					name: "libaconfig_storage_read_api_cc",
 					srcs: ["libaconfig_storage_read_api_cc.cc"],
 				}
-				cc_library {
-					name: "libaconfig_storage_protos_cc",
-					srcs: ["libaconfig_storage_protos_cc.cc"],
-				}
 				aconfig_declarations {
 					name: "my_aconfig_declarations_foo",
 					package: "com.example.package",