Remove jira_connect_full_namespace_sync FF

Removes the jira_connect_full_namespace_sync
feature flag

app/services/jira_connect_subscriptions/create_service.rb

@@ -35,8 +35,6 @@ module JiraConnectSubscriptions
     end
 
     def schedule_sync_project_jobs
-      return unless Feature.enabled?(:jira_connect_full_namespace_sync)
-
       namespace.all_projects.each_batch(of: MERGE_REQUEST_SYNC_BATCH_SIZE) do |projects, index|
         JiraConnect::SyncProjectWorker.bulk_perform_in_with_contexts(
           index * MERGE_REQUEST_SYNC_BATCH_DELAY,

changelogs/unreleased/281912_remove_jira_connect_full_namespace_sync_feature_flag.yml

+---
+title: Initially sync Merge Requests with Jira when a namespace is added through the
+  GitLab for Jira app
+merge_request: 51341
+author:
+type: added

config/feature_flags/development/jira_connect_full_namespace_sync.yml

----
-name: jira_connect_full_namespace_sync
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/43880
-rollout_issue_url: 
-type: development
-group: group::ecosystem
-default_enabled: false

doc/integration/jira_development_panel.md

@@ -272,7 +272,7 @@ The GitLab user only needs access when adding a new namespace. For syncing with
 
    ![Configure namespace on GitLab Jira App](img/jira_dev_panel_setup_com_3.png)
 
-After a namespace is added, all future commits, branches, and merge requests of all projects under that namespace are synced to Jira. Past data cannot be synced at the moment.
+After a namespace is added, all future commits, branches, and merge requests of all projects under that namespace are synced to Jira. Past Merge Request data is initially synced. Past branch and commit data cannot be synced at the moment.
 
 For more information, see [Usage](#usage).
 

spec/services/jira_connect_subscriptions/create_service_spec.rb

@@ -49,18 +49,6 @@ RSpec.describe JiraConnectSubscriptions::CreateService do
 
         subject
       end
-
-      context 'when the jira_connect_full_namespace_sync feature flag is disabled' do
-        before do
-          stub_feature_flags(jira_connect_full_namespace_sync: false)
-        end
-
-        specify do
-          expect(JiraConnect::SyncProjectWorker).not_to receive(:bulk_perform_in_with_contexts)
-
-          subject
-        end
-      end
     end
   end