Removes unneeded module.

package.json

@@ -18,7 +18,6 @@
   "devDependencies": {
     "@types/express": "4.16.1",
     "@types/lodash": "4.14.121",
-    "dtslint": "Microsoft/dtslint#production",
     "jayschema": "^0.3.1",
     "json-schema-to-typescript": "^4.2.0",
     "tslint": "^5.2.0",