ui: Remove unneeded RegisterNatives() call on Android

ui/events/android/motion_event_android.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/android/motion_event_android.h"
 
 #include <android/input.h>
 
 #include <cmath>
 
@@ skipping 336 matching lines @@
   result.position =
       gfx::PointF(ToDips(pointer.pos_x_pixels), ToDips(pointer.pos_y_pixels));
   result.touch_major = ToDips(pointer.touch_major_pixels);
   result.touch_minor = ToDips(pointer.touch_minor_pixels);
   result.orientation = ToValidFloat(pointer.orientation_rad);
   result.tilt = ToValidFloat(pointer.tilt_rad);
   result.tool_type = FromAndroidToolType(pointer.tool_type);
   return result;
 }
 
-// static
-bool MotionEventAndroid::RegisterMotionEventAndroid(JNIEnv* env) {
-  return JNI_MotionEvent::RegisterNativesImpl(env);
-}
-
 }  // namespace content