Rectify checkout_index_index.xml layout file cross modules.

[pratiksangani]

Description (*)

Removed duplicate layout XML code from checkout_index_index.xml of other modules.

Related Pull Requests

#30538

Fixed Issues (if relevant)

1. This is code improvement.

Manual testing scenarios (*)

N/A

Questions or comments

Contribution checklist (*)

• [x] Pull request has a meaningful description of its purpose
• [x] All commits are accompanied by meaningful commit messages
• [ ] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] All automated tests passed successfully (all builds are green)

Resolved issues:

1. [x] resolves magento/magento2#30713: Rectify checkout_index_index.xml layout file cross modules.