Removed no-op code.

Test: pass existing tests.
Change-Id: I4acb21b4df9d9d97d8888c8f9373c9f195270589

services/core/java/com/android/server/wm/KeyguardController.java

@@ -209,8 +209,6 @@ class KeyguardController {
 
         if (keyguardChanged) {
             // Irrelevant to AOD.
-            dismissMultiWindowModeForTaskIfNeeded(displayId,
-                    null /* currentTaskControllsingOcclusion */);
             state.mKeyguardGoingAway = false;
             if (keyguardShowing) {
                 state.mDismissalRequested = false;