PR766 Remove finagle's db test

finagle/benchmark_config

@@ -4,8 +4,6 @@
     "default": {
       "setup_file": "setup",
       "json_url": "/json",
-      "db_url": "/db",
-      "query_url": "/db?queries=",
       "port": 8080,
       "approach": "Realistic",
       "classification": "Micro",