[ISSUE #221]fix: avoid file not found err when remove old offset file

[xujianhai666]

• add check before remove offset file

Closes #221

[codecov-io]

Codecov Report

Merging #239 into native will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           native     #239      +/-   ##
==========================================
- Coverage   26.93%   26.92%   -0.02%     
==========================================
  Files          46       46              
  Lines        4670     4672       +2     
==========================================
  Hits         1258     1258              
- Misses       3239     3241       +2     
  Partials      173      173

Impacted Files	Coverage Δ
internal/utils/files.go	0% <0%> (ø)	⬆️

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