Remove the legacy EarlyWarning tip mechanism to improve performance

Fix: 263835342
Test: presubmit
Change-Id: I0c3f61a21874c70b49cdeb73bbdc285ef8c4a35f

src/com/android/settings/fuelgauge/PowerUsageFeatureProvider.java

@@ -91,15 +91,6 @@ public interface PowerUsageFeatureProvider {
      */
     String getOldEstimateDebugString(String timeRemaining);
 
-    /**
-     * Returns a signal to indicate if the device will need to warn the user they may not make it
-     * to their next charging time.
-     *
-     * @param id Optional string used to identify the caller for metrics. Usually the class name of
-     *           the caller
-     */
-    boolean getEarlyWarningSignal(Context context, String id);
-
     /**
      * Checks whether smart battery feature is supported in this device
      */