Deprecate configuration related to git_trace_log_file
<!--- Please read this! Before you create a new issue, please make sure that you already ran `sudo gitlab-ctl reconfigure` Also make sure to search in https://gitlab.com/gitlab-org/omnibus-gitlab/issues, to verify the issue you're about to submit isn't a duplicate. ---> ### Summary Currently gitlab-shell no longer support actions related to git_trace_log_file. Code related to git_trace_log_file in https://gitlab.com/gitlab-org/gitlab-shell/commit/0b4fd0af16555b2bdc28f6b18781d72226c5d56c has long gone by now. See https://gitlab.com/gitlab-org/gitaly/issues/1300 for reference of removal commit ### Steps to reproduce ```bash >rg git_trace_log_file files/gitlab-config-template/gitlab.rb.template 804:# gitlab_shell['git_trace_log_file'] = "/var/log/gitlab/gitlab-shell/gitlab-shell-git-trace.log" spec/chef/recipes/gitlab-shell_spec.rb 89: git_trace_log_file: '/tmp/log/gitlab-shell-git-trace.log' 97: git_trace_log_file: '/tmp/log/gitlab-shell-git-trace.log' files/gitlab-cookbooks/gitlab/attributes/default.rb 448:default['gitlab']['gitlab-shell']['git_trace_log_file'] = nil files/gitlab-cookbooks/gitlab/recipes/gitlab-shell.rb 76: git_trace_log_file: node['gitlab']['gitlab-shell']['git_trace_log_file'], files/gitlab-cookbooks/gitlab/templates/default/gitlab-shell-config.yml.erb 43:<% if @git_trace_log_file %> 49:git_trace_log_file: "<%= @git_trace_log_file %>" ``` ### What is the current *bug* behavior? Poor documentation and confusing configuration ### What is the expected *correct* behavior? References related to this settings should be removed together with the code in gitlab-shell
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