Remove unneeded JNI registrations.

android_webview/native/aw_form_database.cc

Index: android_webview/native/aw_form_database.cc
diff --git a/android_webview/native/aw_form_database.cc b/android_webview/native/aw_form_database.cc
index 851340e265d8acf35496cf53dab30b79252e5ba3..7e1dc1b21a576cc8f916b5607e2a2825a6b906f5 100644
--- a/android_webview/native/aw_form_database.cc
+++ b/android_webview/native/aw_form_database.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 "android_webview/native/aw_form_database.h"
-
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_content_browser_client.h"
 #include "android_webview/browser/aw_form_database_service.h"
@@ -35,8 +33,4 @@ void ClearFormData(JNIEnv*, jclass) {
   GetFormDatabaseService()->ClearFormData();
 }
 
-bool RegisterAwFormDatabase(JNIEnv* env) {
-  return RegisterNativesImpl(env) >= 0;
-}
-
 } // namespace android_webview