chore: Remove unused IPFS/Pinata caching code

The PinataIPFSClient, IPFSUtils, and @pinata/sdk dependency are not
consumed by any repo in @UMAprotocol or @across-protocol. Other repos
that interact with Pinata do so via their own independent integrations.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nicholaspai

package.json

@@ -117,7 +117,6 @@
     "@eth-optimism/sdk": "^3.3.1",
     "@ethersproject/bignumber": "^5.7.0",
     "@nktkas/hyperliquid": "^0.25.9",
-    "@pinata/sdk": "^2.1.0",
     "@solana-program/compute-budget": "^0.11.0",
     "@solana-program/system": "^0.10.0",
     "@solana-program/token": "^0.9.0",

src/caching/IPFS/PinataIPFSClient.ts

@@ -1,3 +1,2 @@
-export * from "./IPFS";
 export * from "./Arweave";
 export * from "./Memory";

src/caching/IPFS/index.ts

@@ -12,7 +12,6 @@ export * from "./TokenUtils";
 export * from "./LogUtils";
 export * from "./BundleUtils";
 export * from "./JSONUtils";
-export * from "./IPFSUtils";
 export * from "./NumberUtils";
 export * from "./DeploymentUtils";
 export * from "./FormattingUtils";