removed obsolete JS dependencies

Author: jonasjabari

package.json

@@ -11,8 +11,6 @@
     "@rails/webpacker": "5.2.1",
     "@popperjs/core": "^2.5.4",
     "bootstrap": "^5.0.0-beta2",
-    "bootstrap-icons": "^1.1.0",
-    "flatpickr": "^4.6.6",
     "link-module-alias": "^1.2.0",
     "matestack-ui-core": "^1.4.1",
     "rails-erb-loader": "^5.5.2"