Remove unused dependencies

package.json

@@ -13,26 +13,21 @@
     "bootstrap": "^4.4.1",
     "bootstrap-select": "^1.13.12",
     "fullcalendar": "^3.10.1",
-    "gulp-flatten": "^0.4.0",
     "jquery": "^3.4.1",
     "konami": "^1.6.2",
     "moment": "^2.24.0",
     "popper.js": "^1.16.1",
     "raven-js": "^3.27.2",
-    "transform": "^1.1.2"
   },
   "devDependencies": {
-    "animate-sass": "^0.8.2",
     "browser-sync": "^2.26.7",
     "gulp": "^4.0.2",
     "gulp-clean-css": "^4.2.0",
-    "gulp-concat": "^2.6.1",
-    "gulp-plumber": "^1.2.1",
     "gulp-postcss": "^8.0.0",
-    "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.0.2",
     "gulp-sourcemaps": "^2.6.5",
     "gulp-terser": "^1.2.0",
-    "node-sass": "^4.13.1"
+    "node-sass": "^4.13.1",
+    "gulp-flatten": "^0.4.0",
   }
 }