remove: legacy test cleanup report

- Remove tests/cleanup-report.json artifact from previous cleanup
- File contained historical cleanup information no longer needed
- Reduces codebase clutter and focuses on current state

tests/cleanup-report.json

@@ -1,30 +0,0 @@
-{
-  "cleanup_date": "2025-09-08T08:20:49Z",
-  "removed_files": ["manual/admin-login-debug.js", "manual/auth-db-debug.js", "manual/debug-email-validation.js"],
-  "added_files": [
-    "__mocks__/index.js",
-    "e2e/auth-debug.spec.ts",
-    "e2e/test-utils.ts",
-    "integration/run-integration.sh",
-    "README-CLEANUP.md"
-  ],
-  "optimizations": {
-    "removed_manual_tests": 3,
-    "added_automated_tests": 1,
-    "consolidated_mocks": true,
-    "added_test_utilities": true,
-    "improved_documentation": true
-  },
-  "test_count_before": {
-    "manual": 3,
-    "e2e": 5,
-    "integration": 1,
-    "unit": "variable"
-  },
-  "test_count_after": {
-    "manual": 0,
-    "e2e": 6,
-    "integration": 1,
-    "unit": "variable"
-  }
-}