remove mutex

[ktong]

No description provided.

[codecov]

Codecov Report

Merging #57 (39be678) into main (14617d4) will decrease coverage by 4.31%.
The diff coverage is 33.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
- Coverage   76.66%   72.35%   -4.31%     
==========================================
  Files          17       17              
  Lines         617      662      +45     
==========================================
+ Hits          473      479       +6     
- Misses        134      173      +39     
  Partials       10       10              

Components	Coverage Δ
konf	86.64% <33.33%> (-9.38%)	⬇️
file	71.11% <ø> (ø)
pflag	40.57% <ø> (ø)

Files	Coverage Δ
global.go	89.47% <ø> (+5.60%)	⬆️
option.go	50.00% <0.00%> (-50.00%)	⬇️
config.go	80.67% <38.18%> (-15.53%)	⬇️