fix: remove duplicate dataloader dependency from indexer-agent

- dataloader is already declared in indexer-common package.json
- indexer-agent gets dataloader through its indexer-common dependency
- resolves version conflict between exact (2.2.2) and range (^2.2.2)

Author: DaMandal0rian

packages/indexer-agent/package.json

@@ -34,7 +34,6 @@
     "@thi.ng/heaps": "^1.3.1",
     "axios": "0.26.1",
     "bs58": "5.0.0",
-    "dataloader": "2.2.2",
     "delay": "^5.0.0",
     "ethers": "5.7.0",
     "evt": "1.9.12",