rich-indexer: Do not insert uncle block into database

[eval-exec]

What problem does this PR solve?

For rich-indexer, we don't really need to insert uncle block related info into database. This PR remove the related logic.

Related changes

• Remove the uncle block logic for rich-indexer

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code ci-runs-only: [ quick_checks,linters ]

Side effects

• None

Release note

Title Only: Include only the PR title in the release note.

[doitian]

Suggest adding a release note that user can delete the table by running SQL DROP table xxx