Remove unused library

package.json

@@ -20,7 +20,6 @@
     "font-awesome": "^4.7.0",
     "fuse.js": "^3.2.0",
     "get-closest": "^0.0.4",
-    "git-revision-webpack-plugin": "^3.0.3",
     "html-webpack-plugin": "^3.2.0",
     "mini-css-extract-plugin": "^0.4.0",
     "mousetrap": "^1.6.1",