Remove unused api.

bug:15595155
Change-Id: Ifd79365bd45f20f531782244f471a4cfc32a4135

core/java/android/net/ConnectivityManager.java

@@ -1549,28 +1549,6 @@ public class ConnectivityManager {
         }
     }
 
-    /**
-     * Try to ensure the device stays awake until we connect with the next network.
-     * Actually just holds a wakelock for a number of seconds while we try to connect
-     * to any default networks.  This will expire if the timeout passes or if we connect
-     * to a default after this is called.  For internal use only.
-     *
-     * @param forWhom the name of the network going down for logging purposes
-     * @return {@code true} on success, {@code false} on failure
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CONNECTIVITY_INTERNAL}.
-     * {@hide}
-     */
-    public boolean requestNetworkTransitionWakelock(String forWhom) {
-        try {
-            mService.requestNetworkTransitionWakelock(forWhom);
-            return true;
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
     /**
      * Report network connectivity status.  This is currently used only
      * to alter status bar UI.

core/java/android/net/IConnectivityManager.aidl

@@ -99,8 +99,6 @@ interface IConnectivityManager
 
     int setUsbTethering(boolean enable);
 
-    void requestNetworkTransitionWakelock(in String forWhom);
-
     void reportInetCondition(int networkType, int percentage);
 
     void reportBadNetwork(in Network network);