remove some unused deps

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/opencost/package.json

@@ -25,7 +25,6 @@
   "dependencies": {
     "@backstage/core-components": "workspace:^",
     "@backstage/core-plugin-api": "workspace:^",
-    "@backstage/theme": "workspace:^",
     "@date-io/luxon": "1.x",
     "@material-ui/core": "^4.9.13",
     "@material-ui/icons": "^4.9.1",
@@ -45,14 +44,8 @@
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",
-    "@backstage/core-app-api": "workspace:^",
     "@backstage/dev-utils": "workspace:^",
-    "@backstage/test-utils": "workspace:^",
-    "@testing-library/jest-dom": "^6.0.0",
-    "@testing-library/react": "^14.0.0",
-    "@testing-library/user-event": "^14.0.0",
-    "cross-fetch": "^4.0.0",
-    "msw": "^1.0.0"
+    "@testing-library/jest-dom": "^6.0.0"
   },
   "files": [
     "dist",