Remove unused `locationOnScreen` variable

library/ui/src/main/java/com/google/android/exoplayer2/ui/DefaultTimeBar.java

@@ -196,7 +196,6 @@ public class DefaultTimeBar extends View implements TimeBar {
   private final Formatter formatter;
   private final Runnable stopScrubbingRunnable;
   private final CopyOnWriteArraySet<OnScrubListener> listeners;
-  private final int[] locationOnScreen;
   private final Point touchPosition;
   private final float density;
 
@@ -248,7 +247,6 @@ public class DefaultTimeBar extends View implements TimeBar {
     scrubberPaint = new Paint();
     scrubberPaint.setAntiAlias(true);
     listeners = new CopyOnWriteArraySet<>();
-    locationOnScreen = new int[2];
     touchPosition = new Point();
 
     // Calculate the dimensions and paints for drawn elements.