crypto: simplify split usage [trivial]

[mina86]

No description provided.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (21851d2) 71.77% compared to head (b7b1fd2) 71.80%.

Files	Patch %	Lines
core/crypto/src/signature.rs	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10285      +/-   ##
==========================================
+ Coverage   71.77%   71.80%   +0.03%     
==========================================
  Files         712      712              
  Lines      142859   142858       -1     
  Branches   142859   142858       -1     
==========================================
+ Hits       102540   102585      +45     
+ Misses      35611    35569      -42     
+ Partials     4708     4704       -4     

Flag	Coverage Δ
backward-compatibility	0.08% <0.00%> (ø)
db-migration	0.08% <0.00%> (ø)
genesis-check	1.25% <50.00%> (-0.01%)	⬇️
integration-tests	36.13% <50.00%> (-0.06%)	⬇️
linux	71.66% <50.00%> (+0.04%)	⬆️
linux-nightly	71.39% <50.00%> (+0.02%)	⬆️
macos	53.89% <50.00%> (-1.12%)	⬇️
pytests	1.48% <50.00%> (-0.01%)	⬇️
sanity-checks	1.28% <0.00%> (+<0.01%)	⬆️
unittests	68.16% <50.00%> (+0.03%)	⬆️
upgradability	0.13% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[wacban]

LGTM