Remove redundant jest config

Author: ospatil

generators/app/templates/_package.json

@@ -33,7 +33,6 @@
     "@types/node": "^8.0.0",
     "coveralls": "^2.0.0",
     "jest": "^22.0.4",
-    "jest-environment-node-debug": "^2.0.0",
     "prettier": "^1.5.2",
     "rimraf": "^2.0.0",
     "ts-jest": "^22.0.1",
@@ -51,7 +50,6 @@
     },
     "testRegex": "(/__tests__/.*|\\.(test|spec))\\.(ts|js)$",
     "moduleFileExtensions": ["ts", "js"],
-    "testEnvironment": "node",
-    "mapCoverage": true
+    "testEnvironment": "node"
   }
 }