remove recursive flag for ls

[mike0sv]

closes #384

[codecov]

Codecov Report

Base: 89.51% // Head: 89.51% // No change to project coverage 👍

Coverage data is based on head (c81b3ea) compared to base (8a409c8).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #393   +/-   ##
=======================================
  Coverage   89.51%   89.51%           
=======================================
  Files          81       81           
  Lines        6276     6276           
=======================================
  Hits         5618     5618           
  Misses        658      658           

Impacted Files	Coverage Δ
mlem/core/index.py	65.71% <ø> (ø)

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