drop eslint-plugin-html from package.json

debian/patches/0420-use-system-libs.patch

@@ -1,6 +1,6 @@
 --- a/package.json
 +++ b/package.json
-@@ -12,52 +12,43 @@
+@@ -12,52 +12,42 @@
      "webpack-prod": "NODE_ENV=production NODE_PATH=/usr/share/gitlab/node_modules node_modules/.bin/webpack --config config/webpack.config.js"
    },
    "dependencies": {
@@ -17,7 +17,7 @@
      "document-register-element": "^1.3.0",
      "dropzone": "^4.2.0",
      "emoji-unicode-version": "^0.2.1",
-     "eslint-plugin-html": "^2.0.1",
+-    "eslint-plugin-html": "^2.0.1",
 -    "exports-loader": "^0.6.4",
      "file-loader": "^0.11.1",
 -    "jed": "^1.1.1",