Remove custom updateState() if it's just setting summary

Change-Id: I6311d67d6ba11961a6814b91dcd8e37a2e17df40
Fixes: 73950519
Test: rerun robotests

src/com/android/settings/display/ColorModePreferenceController.java

@@ -18,7 +18,6 @@ import android.os.IBinder;
 import android.os.Parcel;
 import android.os.RemoteException;
 import android.os.ServiceManager;
-import android.support.v7.preference.Preference;
 import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
@@ -45,11 +44,6 @@ public class ColorModePreferenceController extends BasePreferenceController {
         return mConfigWrapper.isScreenWideColorGamut() ? AVAILABLE : DISABLED_FOR_USER;
     }
 
-    @Override
-    public void updateState(Preference preference) {
-        preference.setSummary(getSummary());
-    }
-
     @Override
     public CharSequence getSummary() {
         final int colorMode = getColorDisplayController().getColorMode();