Merge pull request #1723 from hackmdio/chore/remove-uglifyjs

chore: remove unused uglifyjs-webpack-plugin dep

Author: Yukaii

package-lock.json

@@ -193,7 +193,6 @@
     "tedious": "~6.2.0",
     "turndown": "~5.0.3",
     "typo-js": "^1.0.3",
-    "uglifyjs-webpack-plugin": "~1.2.7",
     "url-loader": "~1.0.1",
     "vega": "~5.17.1",
     "vega-embed": "~6.14.2",