jni_generator: remove obsolete/unused features.

base/android/jni_generator/testNativeExportsOption.golden

Index: base/android/jni_generator/testNativeExportsOption.golden
diff --git a/base/android/jni_generator/testNativeExportsOption.golden b/base/android/jni_generator/testNativeExportsOption.golden
index 13cd2b94a3b81997879504f01f9a7f9556afe39b..2c89e3bacca85e0c32eb27e894a9027f21d4fa7c 100644
--- a/base/android/jni_generator/testNativeExportsOption.golden
+++ b/base/android/jni_generator/testNativeExportsOption.golden
@@ -195,18 +195,9 @@ static_cast<jstring>(env->CallStaticObjectMethod(SampleForTests_clazz(env),
 
 // Step 3: RegisterNatives.
 
-static bool RegisterNativesImpl(JNIEnv* env, jclass clazz) {
-
-  base::subtle::Release_Store(&g_SampleForTests_clazz,
-      static_cast<base::subtle::AtomicWord>(env->NewWeakGlobalRef(clazz));
+static bool RegisterNativesImpl(JNIEnv* env) {
 
   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