benchmark: remove unreachable code

PR-URL: libuv#3092
Reviewed-By: Santiago Gimeno <[email protected]>

Author: hodovani

test/run-benchmarks.c

@@ -54,8 +54,6 @@ int main(int argc, char **argv) {
     fflush(stderr);
     return EXIT_FAILURE;
   }
-
-  return EXIT_SUCCESS;
 }