Fix flake8 violation

[danielhollas]

flake8 currently fails on main (I have no idea why the CI is green on the latest commit though, very strange). This is the error:

aiidalab_launch/profile.py:94:17: B038 editing a loop's mutable iterable often leads to unexpected results/bugs
                self.extra_mounts.remove(extra_mount)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3ce5a06) 86.54% compared to head (b991c86) 86.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
- Coverage   86.54%   86.32%   -0.22%     
==========================================
  Files           9        9              
  Lines         914      914              
==========================================
- Hits          791      789       -2     
- Misses        123      125       +2     

Flag	Coverage Δ
py-3.10	86.21% <100.00%> (ø)
py-3.11	86.21% <100.00%> (ø)
py-3.12	86.21% <100.00%> (-0.22%)	⬇️
py-3.8	86.16% <100.00%> (ø)
py-3.9	86.27% <100.00%> (ø)

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[unkcpz]

Looks good, thanks!

[unkcpz]

(I have no idea why the CI is green on the latest commit though, very strange)

No idea.. Maybe the dependencies in your environment are slightly different? But anyway, the change looks good.