chore: remove unused dependencies

Remove 30 dependencies across 18 packages that have no imports in
source code and are not peer dependencies of any other dependency.

Signed-off-by: Fredrik Adelöw <freben@spotify.com>
Made-with: Cursor

plugins/signals-node/package.json

@@ -38,13 +38,8 @@
   },
   "dependencies": {
     "@backstage/backend-plugin-api": "workspace:^",
-    "@backstage/config": "workspace:^",
-    "@backstage/plugin-auth-node": "workspace:^",
     "@backstage/plugin-events-node": "workspace:^",
-    "@backstage/types": "workspace:^",
-    "express": "^4.22.0",
-    "uuid": "^11.0.0",
-    "ws": "^8.18.0"
+    "@backstage/types": "workspace:^"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",