Removes dev client from security tasks

Omnibus is currently moving its security development to GitLab Security,
so it won't be longer necessary to validate and merge MR on
dev.gitlab.org.

Also modifies the projects_to_verify to return only GitLab Security and
Omnibus GitLab Security

Related to gitlab-com/gl-infra/delivery#692

lib/release_tools/security/merge_requests_validator.rb

@@ -127,19 +127,10 @@ module ReleaseTools
       private
 
       def projects_to_verify
-        if @client.security_remote?
-          %w[
-            gitlab-org/security/gitlab
-          ]
-        else
-          %w[
-            gitlab/gitlabhq
-            gitlab/gitlab-ee
-            gitlab/gitaly
-            gitlab/gitlab-workhorse
-            gitlab/omnibus-gitlab
-          ]
-        end
+        %w[
+          gitlab-org/security/gitlab
+          gitlab-org/security/omnibus-gitlab
+        ]
       end
     end
   end

lib/tasks/security.rake

@@ -26,10 +26,6 @@ namespace :security do
       ReleaseTools::Security::Mirrors.disable
     end
 
-    ReleaseTools::Security::MergeRequestsMerger
-      .new(ReleaseTools::Security::DevClient.new, merge_master: merge_master)
-      .execute
-
     ReleaseTools::Security::MergeRequestsMerger
       .new(ReleaseTools::Security::Client.new, merge_master: merge_master)
       .execute
@@ -78,10 +74,6 @@ namespace :security do
 
   desc 'Validates security merge requests'
   task validate: :force_security do
-    ReleaseTools::Security::MergeRequestsValidator
-      .new(ReleaseTools::Security::DevClient.new)
-      .execute
-
     ReleaseTools::Security::MergeRequestsValidator
       .new(ReleaseTools::Security::Client.new)
       .execute