Remove unused package

Author: tohosaku

package-lock.json

@@ -83,9 +83,7 @@
     "null-loader": "^3.0.0",
     "postcss-loader": "^3.0.0",
     "puppeteer": "^1.20.0",
-    "puppeteer-firefox": "^0.5.1",
     "remove-strict-webpack-plugin": "^0.1.2",
-    "requirejs": "^2.3.6",
     "sceditor": "^2.1.3",
     "sinon": "^8.1.1",
     "standard": "^11.0.1",