Removed some redundant code

src/timeline/component/ItemSet.js

@@ -430,14 +430,8 @@ ItemSet.prototype.redraw = function() {
   height = Math.max(height, minHeight);
   this.stackDirty = false;
 
-  // reposition frame
-  frame.style.left    = asSize(options.left, '');
-  frame.style.right   = asSize(options.right, '');
-  frame.style.top     = asSize((orientation == 'top') ? '0' : '');
-  frame.style.bottom  = asSize((orientation == 'top') ? '' : '0');
-  frame.style.width   = asSize(options.width, '100%');
+  // update frame height
   frame.style.height  = asSize(height);
-  //frame.style.height  = asSize('height' in options ? options.height : height); // TODO: reckon with height
 
   // calculate actual size and position
   this.props.top = frame.offsetTop;