Drop group_id from compliance_management_frameworks table

Compliance management frameworks are assigned to namespaces
not groups. This column was ignored in 13.6 and has
been eligible for deletion since 2020-12-06.

changelogs/unreleased/mw-remove-column-compliance-frameworks-group_id.yml

+---
+title: Drop group_id column from compliance_management_frameworks table
+merge_request: 50829
+author:
+type: removed

db/post_migrate/20210105103649_delete_column_group_id_on_compliance_framework.rb

+# frozen_string_literal: true
+
+class DeleteColumnGroupIdOnComplianceFramework < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    remove_column :compliance_management_frameworks, :group_id, :bigint
+  end
+end

db/schema_migrations/20210105103649

+0a318fbcf54860d9fe8b3e8372e10331d2b52df738e621f4b0eec5fd4f255739
\ No newline at end of file

db/structure.sql

@@ -11418,7 +11418,6 @@ ALTER SEQUENCE commit_user_mentions_id_seq OWNED BY commit_user_mentions.id;
 
 CREATE TABLE compliance_management_frameworks (
     id bigint NOT NULL,
-    group_id bigint,
     name text NOT NULL,
     description text NOT NULL,
     color text NOT NULL,