chore: remove isomorphic-form-data from dependencies

The need to explicitly specify this dependency was resolved.

Issue: https://github.com/swagger-api/swagger-ui/issues/7436
Resolution: https://github.com/swagger-api/swagger-ui/issues/7436#issuecomment-889792304
Signed-off-by: Tim Klever <tim.v.klever@aexp.com>

plugins/api-docs/package.json

@@ -71,8 +71,7 @@
     "graphql": "^16.0.0",
     "graphql-config": "^5.0.2",
     "graphql-ws": "^5.4.1",
-    "isomorphic-form-data": "^2.0.0",
-    "swagger-ui-react": "^5.0.0"
+    "swagger-ui-react": "^5.27.1"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",