remove unnecessary package

package.json

@@ -93,7 +93,6 @@
     "jquery-slimscroll": "^1.3.8",
     "jquery-ui": "^1.12.1",
     "jquery.cookie": "~1.4.1",
-    "lodash-webpack-plugin": "^0.11.4",
     "markdown-it": "^8.4.0",
     "markdown-it-emoji": "^1.4.0",
     "markdown-it-footnote": "^3.0.1",

yarn.lock

@@ -4073,12 +4073,6 @@ locate-path@^2.0.0:
     p-locate "^2.0.0"
     path-exists "^3.0.0"
 
-lodash-webpack-plugin@^0.11.4:
-  version "0.11.4"
-  resolved "https://registry.yarnpkg.com/lodash-webpack-plugin/-/lodash-webpack-plugin-0.11.4.tgz#6c3ecba3d4b8d24b53940b63542715c5ed3c4ac5"
-  dependencies:
-    lodash "^4.17.4"
-
 lodash._arraycopy@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/lodash._arraycopy/-/lodash._arraycopy-3.0.0.tgz#76e7b7c1f1fb92547374878a562ed06a3e50f6e1"