Remove unneeded JNI registrations.

chrome/browser/android/voice_search_tab_helper.cc

Index: chrome/browser/android/voice_search_tab_helper.cc
diff --git a/chrome/browser/android/voice_search_tab_helper.cc b/chrome/browser/android/voice_search_tab_helper.cc
index 0430159ac66695e5bf54378533561aad3e000da3..02e006ee4d6eccd279894b750b29e6aeba0100c0 100644
--- a/chrome/browser/android/voice_search_tab_helper.cc
+++ b/chrome/browser/android/voice_search_tab_helper.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 "chrome/browser/android/voice_search_tab_helper.h"
-
 #include "chrome/browser/google/google_util.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
@@ -12,11 +10,6 @@
 
 using content::WebContents;
 
-// Register native methods
-bool RegisterVoiceSearchTabHelper(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
 static void UpdateAutoplayStatus(JNIEnv* env,
                                  jobject obj,
                                  jobject j_web_contents) {