Remove DeletedRecord from partition manager

This change removes LooseForeignKeys::DeletedRecord from the partition
manager initializer. Due to a change, we're not going to use partition
manager to manage the partitions for this table at the moment.

config/initializers/postgres_partitioning.rb

@@ -2,8 +2,7 @@
 
 Gitlab::Database::Partitioning.register_models([
   AuditEvent,
-  WebHookLog,
-  LooseForeignKeys::DeletedRecord
+  WebHookLog
 ])
 
 if Gitlab.ee?

spec/lib/gitlab/database/partitioning_spec.rb

@@ -45,4 +45,10 @@ RSpec.describe Gitlab::Database::Partitioning do
       described_class.drop_detached_partitions
     end
   end
+
+  context 'ensure that the registered models have partitioning strategy' do
+    it 'fails when partitioning_strategy is not specified for the model' do
+      expect(described_class.registered_models).to all(respond_to(:partitioning_strategy))
+    end
+  end
 end