[cs] remove unused vars from Runtime.compare

std/cs/internal/Runtime.hx

@@ -230,9 +230,6 @@ import cs.system.Object;
 						throw new cs.system.ArgumentException("Cannot compare " + nativeType(v1).ToString() + " and " + nativeType(v2).ToString());
 					var s1 = Lib.as(v1,String);
 					var s2 = Lib.as(v2,String);
-					var i = 0,
-							l1 = s1.length,
-							l2 = s2.length;
 					return String.Compare(s1,s2, cs.system.StringComparison.Ordinal);
 				case cs.system.TypeCode.Double:
 					var d1:Float = cast v1,