Remove unrelated changes

- Removed unused jsonhandler parameter from run_benchmark function
- Removed unrelated log message for saving output file

Author: fcostaoliveira

memtier_benchmark.cpp

@@ -1412,7 +1412,7 @@ void size_to_str(unsigned long int size, char *buf, int buf_len)
     }
 }
 
-run_stats run_benchmark(int run_id, benchmark_config* cfg, object_generator* obj_gen, json_handler* jsonhandler = NULL)
+run_stats run_benchmark(int run_id, benchmark_config* cfg, object_generator* obj_gen)
 {
     fprintf(stderr, "[RUN #%u] Preparing benchmark client...\n", run_id);
 
@@ -2087,9 +2087,6 @@ int main(int argc, char *argv[])
     }
 
     if (outfile != stdout) {
-        // Log message for saving output file
-        fprintf(stderr, "Saving output file: %s\n", cfg.out_file);
-
         fclose(outfile);
     }