Remove redundant styling for Panel

editor/css/dark.css

@@ -273,7 +273,6 @@ select {
 
 .Panel {
 	color: #888;
-	border-top: 1px solid #222;
 }
 /* */
 

editor/css/light.css

@@ -267,7 +267,6 @@ select {
 
 .Panel {
 	color: #888;
-	border-top: 1px solid #ccc;
 }
 /* */