CSS: Removed redundant "to the number" in comment

Closes gh-1594

src/css.js

@@ -283,7 +283,7 @@ jQuery.extend({
 				return;
 			}
 
-			// If a number, add 'px' to the (except for certain CSS properties)
+			// If a number was passed in, add 'px' (except for certain CSS properties)
 			if ( type === "number" && !jQuery.cssNumber[ origName ] ) {
 				value += "px";
 			}