repl: prevent REPL crash when running (reload) (#2243)

Stops the REPL crashing with `device or resource busy` when running
`(reload)`

However I think this is indicative of a bigger problem where either the
`Compiler` or prompt is not ready to handle input immediately after
creation and setting the status to `OK`.

goalc/main.cpp

@@ -162,7 +162,6 @@ int main(int argc, char** argv) {
             game_version, username,
             std::make_unique<REPL::Wrapper>(username, repl_config, startup_file));
         status = ReplStatus::OK;
-        repl_startup_func();
       }
       // process user input
       std::string input_from_stdin = compiler->get_repl_input();