chore: remove some unwraps

[wolfv]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 80.55556% with 7 lines in your changes missing coverage. Please review.

Project coverage is 63.55%. Comparing base (16b3204) to head (8f4c698).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/shell/src/commands/uname.rs	82.60%	4 Missing ⚠️
crates/shell/src/commands/which.rs	76.92%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
+ Coverage   62.86%   63.55%   +0.69%     
==========================================
  Files          28       28              
  Lines        2251     2261      +10     
==========================================
+ Hits         1415     1437      +22     
+ Misses        836      824      -12     

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[prsabahrami]

Seems good to me.
I'll go ahead and merge it.