Install/update deps

package.json

@@ -49,7 +49,6 @@
     "@babel/core": "^7.6.4",
     "@rails/actioncable": "^6.0.0",
     "@rails/activestorage": "^6.0.0",
-    "@rails/ujs": "^6.0.0",
     "@rails/webpacker": "^4.0.7",
     "bootstrap": "^4.3.1",
     "core-js": "^3.4.5",

yarn.lock

@@ -948,11 +948,6 @@
   dependencies:
     spark-md5 "^3.0.0"
 
-"@rails/ujs@^6.0.0":
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/@rails/ujs/-/ujs-6.0.0.tgz#6c1957870ba075f7e82fdf875f5ed2181ff9355e"
-  integrity sha512-0oh/MnpZzluItU/vgaxZv+JtMXxOtA0HPK6ZiMoPd2sLH06q58QdCKPVlC36YMnP4451rcrvxO6xns3w97C1og==
-
 "@rails/webpacker@^4.0.7":
   version "4.0.7"
   resolved "https://registry.yarnpkg.com/@rails/webpacker/-/webpacker-4.0.7.tgz#268571bf974e78ce57eca9fa478f5bd97fd5182c"