chore: remove duplicate dependencies/devDependencies entries

Several packages had the same dependency listed in both `dependencies`
and `devDependencies`. This removes the duplicate from whichever section
is incorrect based on actual usage in the source code.

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

packages/backend-defaults/package.json

@@ -202,7 +202,6 @@
   },
   "devDependencies": {
     "@aws-sdk/util-stream-node": "^3.350.0",
-    "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
     "@google-cloud/cloud-sql-connector": "^1.4.0",