Remove unneeded JNI registrations.

base/android/path_service_android.cc

Index: base/android/path_service_android.cc
diff --git a/base/android/path_service_android.cc b/base/android/path_service_android.cc
index 18ca70c8abd8a00e898791f37bd000fc3b13a4e7..3d9ed911408248666625befa60bf9748e737c116 100644
--- a/base/android/path_service_android.cc
+++ b/base/android/path_service_android.cc
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/android/path_service_android.h"
-
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/files/file_path.h"
@@ -18,9 +16,5 @@ void Override(JNIEnv* env, jclass clazz, jint what, jstring path) {
   PathService::Override(what, file_path);
 }
 
-bool RegisterPathService(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
 }  // namespace android
 }  // namespace base