Remove "gunicorn" from benchmark_config

flask/benchmark_config

@@ -60,7 +60,7 @@
       "framework": "flask",
       "language": "Python",
       "orm": "Full",
-      "platform": "Gunicorn/Meinheld",
+      "platform": "Meinheld",
       "webserver": "None",
       "os": "Linux",
       "database_os": "Linux",
@@ -83,7 +83,7 @@
       "framework": "flask",
       "language": "Python",
       "orm": "Full",
-      "platform": "Gunicorn/Tornado",
+      "platform": "Tornado",
       "webserver": "None",
       "os": "Linux",
       "database_os": "Linux",
@@ -104,7 +104,7 @@
       "framework": "flask",
       "language": "Python",
       "orm": "Raw",
-      "platform": "Gunicorn/Tornado",
+      "platform": "Tornado",
       "webserver": "None",
       "os": "Linux",
       "database_os": "Linux",