fix:remove unused variable

[Hayak3]

What problem were solved in this pull request?

Issue Number: close none

Problem: none

What is changed and how it works?

remove directory_status in src/observer/storage/clog/log_file.cpp, solve unused variable error if use clang toolchain

Other information

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.89%. Comparing base (d68ad38) to head (8407b95).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #452      +/-   ##
==========================================
- Coverage   53.89%   53.89%   -0.01%     
==========================================
  Files         149      149              
  Lines        9943     9942       -1     
==========================================
- Hits         5359     5358       -1     
  Misses       4584     4584              

Flag	Coverage Δ
	53.89% <ø> (-0.01%)	⬇️

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