Remove two error codes

webcc/globals.cc

@@ -72,12 +72,8 @@ const char* DescribeError(Error error) {
       return "Socket write error";
     case kHttpError:
       return "HTTP error";
-    case kServerError:
-      return "Server error";
     case kFileIOError:
       return "File IO error";
-    case kXmlError:
-      return "XML error";
     default:
       return "";
   }