authfs: Remove host targets

The code starts to depend on device-only targets like binder. Let's
remove the host targets.

Test: m
Bug: 171280169
Change-Id: Idc717e15d70a633068c3d6c72c34d9423c7e8d8c
diff --git a/authfs/Android.bp b/authfs/Android.bp
index 9808bf6..65d08c9 100644
--- a/authfs/Android.bp
+++ b/authfs/Android.bp
@@ -14,7 +14,6 @@
         "libstructopt",
         "libthiserror",
     ],
-    host_supported: true,
     target: {
         darwin: {
             enabled: false,
@@ -35,7 +34,6 @@
     ],
     bindgen_flags: ["--size_t-is-usize"],
     cflags: ["-D BORINGSSL_NO_CXX"],
-    host_supported: true,
 }
 
 rust_binary {
@@ -43,12 +41,6 @@
     defaults: ["authfs_defaults"],
 }
 
-rust_test_host {
-    name: "authfs_host_test_src_lib",
-    test_suites: ["general-tests"],
-    defaults: ["authfs_defaults"],
-}
-
 // TODO(victorhsieh): Enable the test once "undefined symbol: _Unwind_Resume" is fixed, then add to
 // TEST_MAPPING.
 rust_test {