All: remove .left-labels style rules

These are not used anywhere anymore. Remove these so that we
can remove the unused styles from the base stylesheet.

Ref https://github.com/search?q=org%3Ajquery%20left-labels&type=code

Ref jquery/contribute.jquery.org@3030f39

Author: Krinkle

themes/jquery/css/base.css

@@ -613,39 +613,6 @@ form input[type="submit"] {
 	display: block;
 }
 
-/**
- * Left aligned labels
- */
-
-.left-labels label {
-	padding: 5px 0 0 0;
-	display: block;
-}
-
-.left-labels span {
-	margin: 0 10px 0 0;
-	min-width: 100px;
-
-	float: left;
-
-	text-align: left;
-}
-
-.left-labels .radio span {
-	padding-top: 5px;
-}
-
-.left-labels .radio {
-	display: block;
-}
-
-.left-labels .radio li label {
-	margin: 0;
-	padding: 0 0 5px 0;
-
-	border: 0;
-}
-
 /**
  * Label descriptions
  */