remove all devDependencies

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

@@ -69,7 +69,7 @@
      "visibilityjs": "^1.2.4",
      "vue": "^2.5.13",
      "vue-loader": "^13.7.0",
-@@ -84,8 +55,6 @@
+@@ -84,36 +55,9 @@
      "vue-router": "^3.0.1",
      "vue-template-compiler": "^2.5.13",
      "vuex": "^3.0.1",
@@ -78,3 +78,31 @@
      "webpack-stats-plugin": "^0.1.5",
      "worker-loader": "^1.1.0"
    },
+   "devDependencies": {
+-    "@gitlab-org/gitlab-svgs": "^1.8.0",
+-    "axios-mock-adapter": "^1.10.0",
+-    "babel-plugin-istanbul": "^4.1.5",
+-    "eslint": "^3.18.0",
+-    "eslint-config-airbnb-base": "^10.0.1",
+-    "eslint-import-resolver-webpack": "^0.8.3",
+-    "eslint-plugin-filenames": "^1.1.0",
+-    "eslint-plugin-html": "2.0.1",
+-    "eslint-plugin-import": "^2.2.0",
+-    "eslint-plugin-jasmine": "^2.1.0",
+-    "eslint-plugin-promise": "^3.5.0",
+-    "eslint-plugin-vue": "^4.0.1",
+-    "istanbul": "^0.4.5",
+-    "jasmine-core": "^2.9.0",
+-    "jasmine-jquery": "^2.1.1",
+-    "karma": "^2.0.0",
+-    "karma-chrome-launcher": "^2.2.0",
+-    "karma-coverage-istanbul-reporter": "^1.3.3",
+-    "karma-jasmine": "^1.1.1",
+-    "karma-mocha-reporter": "^2.2.5",
+-    "karma-sourcemap-loader": "^0.3.7",
+-    "karma-webpack": "2.0.7",
+-    "nodemon": "^1.11.0",
+-    "prettier": "1.9.2",
+-    "webpack-dev-server": "^2.6.1"
+   }
+ }