Revert, leave makefile change

Author: WardBrian

src/cmdstan/command.hpp

@@ -831,7 +831,7 @@ int command(int argc, const char *argv[]) {
   //////////////////////////////////////////////////
 
   stan::math::profile_map &profile_data = get_stan_profile_data();
-  if (profile_data.begin() != profile_data.end()) {
+  if (profile_data.size() > 0) {
     std::string profile_file_name
         = get_arg_val<string_argument>(parser, "output", "profile_file");
     std::fstream profile_stream(profile_file_name.c_str(), std::fstream::out);