chore(hub-subgraph): [ETH-883] Remove subpackage (#1005)

The functionality has been moved to `network-subgraphs` package.

## Open questions

The subpackage was removed in
#497, but brought
back in #525. Was
there some subsequent PR which marked the end-of-usage for this
subpackage?

Author: teogeb

.eslintignore

@@ -1,6 +1,5 @@
 packages/tatum-subgraph/generated/*
 packages/network-subgraphs/generated/*
-packages/hub-subgraph/generated/*
 **/typechain
 **/build
 **/dist