Remove fixme comment

[grarco]

Describe your changes

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.99%. Comparing base (a148ac3) to head (d82ac3e).
Report is 52 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3972      +/-   ##
==========================================
- Coverage   73.99%   73.99%   -0.01%     
==========================================
  Files         341      341              
  Lines      106614   106613       -1     
==========================================
- Hits        78888    78887       -1     
  Misses      27726    27726              

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