Merge "Remove reduntant variable" am: 5241a207fb

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1318280

Change-Id: Ia32ef697dbd37aa3c0988f5abd2c7c2ba598e32f

core/java/android/widget/Magnifier.java

@@ -136,8 +136,6 @@ public final class Magnifier {
     // Lock to synchronize between the UI thread and the thread that handles pixel copy results.
     // Only sync mWindow writes from UI thread with mWindow reads from sPixelCopyHandlerThread.
     private final Object mLock = new Object();
-    // The lock used to synchronize the UI and render threads when a #dismiss is performed.
-    private final Object mDestroyLock = new Object();
 
     /**
      * Initializes a magnifier.