remove transaction receipts

Author: kasparkallas

packages/subgraph/CHANGELOG.md

@@ -11,6 +11,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Fix `poolTotalAmountDistributedUntilUpdatedAt` on PoolMember
 - Fix `totalNumberOfActivePools` on TokenStatistics
 - Fix `totalSubscriptionsWithUnits` on TokenStatistics
+- Use declarative eth calls for indexing optimization
+- Remove `receipt: true` from handlers, resulting in `gasUsed` staying null, but improving indexing performance
 
 ## [2.2.0]