Revert of Move //device/generic_sensor to be part of the internal implementation of the Device Service.

services/device/android/register_jni.cc

 // Copyright (c) 2017 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 "services/device/android/register_jni.h"
 
 #include "base/android/jni_android.h"
-#include "services/device/generic_sensor/android/sensors_jni_registrar.h"
 #include "services/device/time_zone_monitor/android/time_zone_monitor_jni_registrar.h"
 
 namespace device {
 
 bool EnsureJniRegistered() {
   static bool g_jni_init_done = false;
 
   if (!g_jni_init_done) {
     JNIEnv* env = base::android::AttachCurrentThread();
 
-    if (!android::RegisterSensorsJni(env))
-      return false;
-
     if (!android::RegisterTimeZoneMonitorJni(env))
       return false;
 
     g_jni_init_done = true;
   }
 
   return true;
 }
 
 }  // namespace device