Remove dependencies that break npm install

TypeError [ERR_INVALID_ARG_TYPE]: The original argument must be of type function
    at promisify (internal/util.js:206:11)
    at Object.<anonymous> (/home/mlncn/.nvm/versions/node/v8.4.0/lib/node_modules/npm/node_modules/@npmcli/move-file/index.js:26:18)
    at Module._compile (module.js:573:30)
    at Object.Module._extensions..js (module.js:584:10)

web/themes/custom/geofresco/package.json

@@ -35,22 +35,7 @@
   ],
   "devDependencies": {
     "babel-plugin-transform-remove-strict-mode": "0.0.2",
-    "babel-preset-env": "^1.6.0",
-    "browser-sync": "^2.18.12",
-    "del": "^3.0.0",
-    "gulp": "^3.9.1",
-    "gulp-autoprefixer": "^4.0.0",
-    "gulp-babel": "^6.1.2",
-    "gulp-concat": "^2.6.1",
-    "gulp-eslint": "^4.0.0",
-    "gulp-imagemin": "^3.3.0",
-    "gulp-order": "^1.1.1",
-    "gulp-rename": "^1.2.2",
-    "gulp-sass": "^3.1.0",
-    "gulp-sass-lint": "^1.3.2",
-    "gulp-sourcemaps": "^2.6.0",
-    "kss": "^3.0.0-beta.18",
-    "run-sequence": "^2.0.0"
+    "babel-preset-env": "^1.6.0"
   },
   "dependencies": {
     "bulma": "^0.7.2",