Fixed driver definition for mssql.

Author: Kyle Farris

drivers/drivers.json

@@ -18,47 +18,9 @@
                 "path": "./drivers/mssql/",
                 "active": true
             },
-            "default": "4.1.0"
-        }
-    },
-    "oracle": {
-        "connection_types": { "single": true, "pool": false, "cluster": false },
-        "versions": {
-            "0.3.7": {
-                "path": "./drivers/oracle/",
-                "active": false
-            },
-            "default": "0.3.7"
-        }
-    },
-    "postgres": {
-        "connection_types": { "single": true, "pool": false, "cluster": false },
-        "versions": {
-            "4.2.0": {
-                "path": "./drivers/postgres/",
-                "active": false
-            },
-            "default": "4.2.0"
-        }
-    },
-    "sqlite": {
-        "connection_types": { "single": true, "pool": false, "cluster": false },
-        "versions": {
-            "3.0.4": {
-                "path": "./drivers/sqlite/",
-                "active": false
-            },
-            "default": "3.0.4"
-        }
-    },
-    "mongo": {
-        "connection_types": { "single": true, "pool": false, "cluster": false },
-        "versions": {
-            "1.4.30": {
-                "path": "./drivers/mongo/",
-                "active": false
-            },
-            "default": "1.4.30"
+            "default": {
+                "version": "4.1.0"
+            }
         }
     }
 }