Remove release_evidence feature flag

Changelog: other

app/controllers/projects/releases/evidences_controller.rb

@@ -20,7 +20,6 @@ module Projects
       private
 
       def authorize_read_release_evidence!
-        access_denied! unless Feature.enabled?(:release_evidence, project, default_enabled: true)
         access_denied! unless can?(current_user, :read_release_evidence, evidence)
       end
 

config/feature_flags/development/release_evidence.yml

----
-name: release_evidence
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/26509
-rollout_issue_url: 
-milestone: '12.10'
-type: development
-group: group::release
-default_enabled: true