chore: Remove BlockSDK Module (backport #530)

[mergify]

---

This is an automatic backport of pull request #530 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 97e5731 has failed:

On branch mergify/bp/release/v1.x.x/pr-530
Your branch is up to date with 'origin/release/v1.x.x'.

You are currently cherry-picking commit 97e5731.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   tests/app/README.md

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   abci/abci.go
	both modified:   abci/abci_test.go
	both modified:   abci/checktx/check_tx_test.go
	both modified:   abci/utils_test.go
	both modified:   block/mempool.go
	both modified:   block/mempool_test.go
	both modified:   tests/app/app.go
	both modified:   tests/app/config.go
	both modified:   tests/e2e/block_sdk_e2e_test.go
	both modified:   tests/integration/integration_test.go
	both modified:   tests/integration/network/network_test.go
	both modified:   testutils/keeper/keeper.go
	both modified:   testutils/mempool/mempool.go
	both modified:   testutils/networksuite/networksuite.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[davidterpay]

module is not on release branch v1