Remove stale credsManager field from conflict resolution

The field was accidentally kept from master during the rebase
conflict resolution but doesn't belong in this PR's version of
the file.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/backend-defaults/src/entrypoints/urlReader/lib/AzureBlobStorageUrlReader.ts

@@ -85,7 +85,6 @@ export class AzureBlobStorageUrlReader implements UrlReaderService {
     });
   };
 
-  private readonly credsManager: AzureCredentialsManager;
   private readonly integration: AzureBlobStorageIntegration;
   private readonly deps: {
     treeResponseFactory: ReadTreeResponseFactory;