FlxSprite: update clipRect documentation (#3403)

Author: ACrazyTown

flixel/FlxSprite.hx

@@ -272,8 +272,6 @@ class FlxSprite extends FlxObject
 
 	/**
 	 * Clipping rectangle for this sprite.
-	 * Changing the rect's properties directly doesn't have any effect,
-	 * reassign the property to update it (`sprite.clipRect = sprite.clipRect;`).
 	 * Set to `null` to discard graphic frame clipping.
 	 */
 	public var clipRect(default, set):FlxRect;