CCM-12614: remove unused npm packages

Author: Ian-Hodges

lambdas/pdm-poll-lambda/package.json

@@ -2,17 +2,12 @@
   "dependencies": {
     "aws-lambda": "^1.0.7",
     "digital-letters-events": "^0.0.1",
-    "lodash": "^4.17.21",
-    "p-limit": "^3.1.0",
     "utils": "^0.0.1"
   },
   "devDependencies": {
     "@tsconfig/node22": "^22.0.2",
     "@types/aws-lambda": "^8.10.155",
     "@types/jest": "^29.5.14",
-    "@types/lodash": "^4.17.20",
-    "aws-sdk-client-mock": "^4.1.0",
-    "aws-sdk-client-mock-jest": "^4.1.0",
     "jest": "^29.7.0",
     "jest-mock-extended": "^3.0.7",
     "typescript": "^5.9.3"