fix: remove extraneous dependency

To comply with semver, we have to stick to eslint@4 and
eslint-plugin-vue@4 in @vue/cli-service-global

Author: haoqunjiang

packages/@vue/cli-service-global/package.json

@@ -27,7 +27,6 @@
     "@vue/cli-service": "^3.1.2",
     "babel-eslint": "^10.0.1",
     "chalk": "^2.4.1",
-    "eslint-plugin-vue": "^5.0.0-0",
     "resolve": "^1.8.1",
     "vue": "^2.5.17",
     "vue-template-compiler": "^2.5.17"