Remove extra semi colon from proxygen/external/http_parser/http_parse…

…r_cpp.cpp

Summary:
`-Wextra-semi` or `-Wextra-semi-stmt`

If the code compiles, this is safe to land.

Reviewed By: dmm-fb

Differential Revision: D51777995

fbshipit-source-id: 32b08133ded51e9f65b0fb1a5474b2b5eb92fba1

proxygen/external/http_parser/http_parser_cpp.cpp

@@ -996,7 +996,7 @@ size_t http_parser_execute_options (http_parser *parser,
         if (ch == ' ' && matcher[parser->index] == '\0') {
           state = s_req_spaces_before_url;
         } else if (ch == matcher[parser->index]) {
-          ; /* nada */
+          /* nada */
         } else if (parser->method == HTTP_CONNECT) {
           if (parser->index == 1 && ch == 'H') {
             parser->method = HTTP_CHECKOUT;