jni_generator: remove obsolete/unused features.

base/android/jni_generator/testNativeExportsOptionalOption.golden

Index: base/android/jni_generator/testNativeExportsOptionalOption.golden
diff --git a/base/android/jni_generator/testNativeExportsOptionalOption.golden b/base/android/jni_generator/testNativeExportsOptionalOption.golden
index e2cf051775061ebef7c7d7d0327d56260f85b422..03484c9ea250381a0f47fa41343c3f22d32a46a1 100644
--- a/base/android/jni_generator/testNativeExportsOptionalOption.golden
+++ b/base/android/jni_generator/testNativeExportsOptionalOption.golden
@@ -232,12 +232,9 @@ static const JNINativeMethod kMethodsSampleForTests[] = {
     },
 };
 
-static bool RegisterNativesImpl(JNIEnv* env, jclass clazz) {
+static bool RegisterNativesImpl(JNIEnv* env) {
   if (base::android::IsManualJniRegistrationDisabled()) return true;
 
-  base::subtle::Release_Store(&g_SampleForTests_clazz,
-      static_cast<base::subtle::AtomicWord>(env->NewWeakGlobalRef(clazz));
-
   const int kMethodsMyOtherInnerClassSize =
       arraysize(kMethodsMyOtherInnerClass);
 
@@ -272,10 +269,4 @@ static bool RegisterNativesImpl(JNIEnv* env, jclass clazz) {
   return true;
 }
 
-extern "C" JNIEXPORT bool JNICALL
-Java_org_chromium_example_jni_1generator_SampleForTests_nativeInitNativeClass(JNIEnv*
-    env, jclass clazz) {
-  return RegisterNativesImpl(env, clazz);
-}
-
 #endif  // org_chromium_example_jni_generator_SampleForTests_JNI