Android: Remove unneeded RegisterNatives() calls

device/vr/android/cardboard/cardboard_vr_device.h

 // Copyright 2015 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.
 
 #ifndef DEVICE_VR_CARDBOARD_VR_DEVICE_H
 #define DEVICE_VR_CARDBOARD_VR_DEVICE_H
 
 #include <jni.h>
 
 #include "base/android/jni_android.h"
 #include "base/macros.h"
 #include "device/vr/vr_device.h"
 
 namespace device {
 
 class CardboardVRDevice : public VRDevice {
  public:
-  static bool RegisterCardboardVRDevice(JNIEnv* env);
-
   explicit CardboardVRDevice(VRDeviceProvider* provider);
   ~CardboardVRDevice() override;
 
   VRDisplayPtr GetVRDevice() override;
   VRPosePtr GetPose() override;
   void ResetPose() override;
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> j_cardboard_device_;
   base::android::ScopedJavaGlobalRef<jfloatArray> j_head_matrix_;
 
   DISALLOW_COPY_AND_ASSIGN(CardboardVRDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_VR_CARDBOARD_VR_DEVICE_H