refactor: remove epoch service in meta

[yezizp2012]

What's changed and what's your intention?

As title.

Please explain IN DETAIL what the changes are in this PR and why they are needed:

• Summarize your change (mandatory)
• How does this PR work? Need a brief introduction for the changed logic (optional)
• Describe clearly one logical change and avoid lazy messages (optional)
• Describe any limitations of the current code (optional)

Checklist

Resolve #2553

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

[fuyufjh]

🥰

[codecov]

Codecov Report

Merging #2554 (623ddcc) into main (e6fecc7) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2554   +/-   ##
=======================================
  Coverage   71.41%   71.41%           
=======================================
  Files         689      688    -1     
  Lines       88521    88512    -9     
=======================================
  Hits        63215    63215           
+ Misses      25306    25297    -9     

Flag	Coverage Δ
rust	71.41% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/meta/src/rpc/server.rs	0.00% <ø> (ø)
src/meta/src/rpc/service/mod.rs	0.00% <ø> (ø)

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