remove unused imports

packages/0x.js/package.json

@@ -51,7 +51,6 @@
     "@types/node": "^8.0.1",
     "@types/sinon": "^2.2.2",
     "@types/uuid": "^3.4.2",
-    "async-child-process": "^1.1.1",
     "awesome-typescript-loader": "^3.1.3",
     "chai": "^4.0.1",
     "chai-as-promised": "^7.1.0",
@@ -67,7 +66,6 @@
     "npm-run-all": "^4.0.2",
     "nyc": "^11.0.1",
     "opn-cli": "^3.1.0",
-    "prompt": "^1.0.0",
     "request": "^2.81.0",
     "request-promise-native": "^1.0.4",
     "shx": "^0.2.2",