chore: fix warnings

[kevwan]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.21%. Comparing base (2629636) to head (acffe12).
Report is 19 commits behind head on master.

Additional details and impacted files

Files	Coverage Δ
core/bloom/bloom.go	96.72% <100.00%> (+0.88%)	⬆️
core/codec/dh.go	82.85% <ø> (+3.31%)	⬆️
core/collection/cache.go	87.05% <ø> (-0.01%)	⬇️
core/conf/config.go	98.90% <100.00%> (+0.25%)	⬆️
core/filex/progressscanner.go	100.00% <ø> (ø)
core/fx/stream.go	100.00% <ø> (ø)
core/iox/pipe.go	84.61% <ø> (+4.61%)	⬆️
core/iox/textfile.go	90.00% <ø> (-2.00%)	⬇️
core/iox/textlinescanner.go	100.00% <ø> (ø)
core/limit/tokenlimit.go	94.20% <100.00%> (+0.30%)	⬆️
... and 14 more

... and 230 files with indirect coverage changes