refactor: remove removed-prefixed keys

[WenyXu]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

This PR removed the removed prefixed keys; these keys weren't in use.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.96%. Comparing base (393ea44) to head (921288a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3535      +/-   ##
==========================================
- Coverage   85.38%   84.96%   -0.42%     
==========================================
  Files         906      906              
  Lines      151023   150953      -70     
==========================================
- Hits       128952   128264     -688     
- Misses      22071    22689     +618     

[tisonkun]

Thank you!

May you cross-refer where we remove they valid usage? Or why we don't need it now.

[WenyXu]

Thank you!

May you cross-refer where we remove they valid usage? Or why we don't need it now.

Actually, we don't require data to be restored from these key values.