Remove dependency to gulp from package.json

Author: lunny

package.json

@@ -24,7 +24,6 @@
     "eslint-config-airbnb-base": "14.0.0",
     "eslint-plugin-import": "2.19.1",
     "fomantic-ui": "2.8.3",
-    "gulp": "4.0.2",
     "less": "3.10.3",
     "postcss-cli": "7.1.0",
     "style-loader": "1.1.2",