Update css.js

Removed redundant "to the number".

src/css.js

@@ -272,7 +272,7 @@ jQuery.extend({
 				return;
 			}
 
-			// If a number was passed in, add 'px' to the number (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";
 			}