Remove relayer and bridge pool from help msgs

[brentstone]

Describe your changes

Small PR to remove them from help messages in binaries (not built anymore anyway)

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 72.83%. Comparing base (e29da65) to head (7063fda).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3830      +/-   ##
==========================================
+ Coverage   72.82%   72.83%   +0.01%     
==========================================
  Files         338      338              
  Lines      104220   104220              
==========================================
+ Hits        75897    75913      +16     
+ Misses      28323    28307      -16     

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