Examples: Clean up. (#21957)

examples/js/controls/DragControls.js

@@ -175,7 +175,7 @@
 
 					case 'mouse':
 					case 'pen':
-						onMouseDown( event );
+						onMouseDown();
 						break;
         // TODO touch
 
@@ -219,7 +219,7 @@
 
 					case 'mouse':
 					case 'pen':
-						onMouseCancel( event );
+						onMouseCancel();
 						break;
         // TODO touch
 

examples/js/controls/TrackballControls.js

@@ -419,7 +419,7 @@
 
 					case 'mouse':
 					case 'pen':
-						onMouseUp( event );
+						onMouseUp();
 						break;
         // TODO touch
 

examples/jsm/controls/DragControls.js

@@ -156,7 +156,7 @@ class DragControls extends EventDispatcher {
 
 				case 'mouse':
 				case 'pen':
-					onMouseDown( event );
+					onMouseDown();
 					break;
 
 				// TODO touch
@@ -198,7 +198,7 @@ class DragControls extends EventDispatcher {
 
 				case 'mouse':
 				case 'pen':
-					onMouseCancel( event );
+					onMouseCancel();
 					break;
 
 				// TODO touch

examples/jsm/controls/TrackballControls.js

@@ -444,7 +444,7 @@ class TrackballControls extends EventDispatcher {
 
 				case 'mouse':
 				case 'pen':
-					onMouseUp( event );
+					onMouseUp();
 					break;
 
 				// TODO touch