refactor: simplify MakeSnapshotCallback

[Trisfald]

Remove one unnecessary parameter from the function type MakeSnapshotCallback.

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.40%. Comparing base (94abfca) to head (b56ed89).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
chain/chain/src/chain.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12849      +/-   ##
==========================================
+ Coverage   70.37%   70.40%   +0.03%     
==========================================
  Files         848      851       +3     
  Lines      174870   174188     -682     
  Branches   174870   174188     -682     
==========================================
- Hits       123064   122641     -423     
+ Misses      46547    46306     -241     
+ Partials     5259     5241      -18     

Flag	Coverage Δ
backward-compatibility	0.16% <0.00%> (+<0.01%)	⬆️
db-migration	0.16% <0.00%> (+<0.01%)	⬆️
genesis-check	1.41% <0.00%> (-0.01%)	⬇️
linux	70.06% <94.44%> (+0.07%)	⬆️
linux-nightly	70.05% <94.44%> (+0.03%)	⬆️
pytests	1.71% <0.00%> (+<0.01%)	⬆️
sanity-checks	1.52% <0.00%> (-0.01%)	⬇️
unittests	70.23% <94.44%> (+0.02%)	⬆️
upgradability	0.20% <0.00%> (+<0.01%)	⬆️

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