[BRE-1851] Remove GPG secrets

[vgrassia]

🎟️ Tracking

• BRE-1851

📔 Objective

This PR removes the GPG secrets as they no longer exist.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.80%. Comparing base (e6f0db6) to head (b2ba852).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6862   +/-   ##
=======================================
  Coverage   85.80%   85.80%           
=======================================
  Files         836      836           
  Lines       59408    59408           
  Branches     8672     8672           
=======================================
  Hits        50977    50977           
  Misses       5442     5442           
  Partials     2989     2989           

Flag	Coverage Δ
app-data	17.54% <ø> (ø)
app-ui-auth-tools	20.13% <ø> (ø)
app-ui-platform	15.85% <ø> (ø)
app-ui-vault	25.66% <ø> (ø)
authenticator	6.61% <ø> (ø)
lib-core-network-bridge	4.28% <ø> (ø)
lib-data-ui	1.02% <ø> (ø)

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