software/gitlab: remove outdated comment

since a1bfe616 (software/gitlab: upgrade to version 12.10.14,
2024-01-09) we no longer manually install ajv

software/gitlab/buildout.hash.cfg

@@ -54,7 +54,7 @@ md5sum = d769ea27820e932c596c35bbbf3f2902
 
 [instance-gitlab.cfg.in]
 _update_hash_filename_ = instance-gitlab.cfg.in
-md5sum = e17bfe96bb9a0f4666d90c877a663e88
+md5sum = 35bb9f1d8f4fd6675bd768d8a7e1253c
 
 [instance-gitlab-export.cfg.in]
 _update_hash_filename_ = instance-gitlab-export.cfg.in

software/gitlab/instance-gitlab.cfg.in

@@ -916,8 +916,6 @@ rake    = ${gitlab-rake:wrapper-path}
 # run command on every reinstantiation
 update-command = ${:command}
 
-# https://gitlab.com/gitlab-org/gitlab-foss/issues/38457
-# we need to manually install ajv@^4.0.0 with yarn to fix the bug 'yarn check failed!'
 command =
     ${:rake} gitlab:assets:clean  &&
     ${:rake} gettext:compile RAILS_ENV=production &&