diff --git a/config/feature_flags/development/optimize_merge_request_parser.yml b/config/feature_flags/development/optimize_merge_request_parser.yml
deleted file mode 100644
index 9e65f5412c445631c8e297d6f874cec5886ba05f..0000000000000000000000000000000000000000
--- a/config/feature_flags/development/optimize_merge_request_parser.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: optimize_merge_request_parser
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62490/
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/331893
-milestone: '14.0'
-type: development
-group: group::source code
-default_enabled: false
diff --git a/lib/banzai/reference_parser/merge_request_parser.rb b/lib/banzai/reference_parser/merge_request_parser.rb
index 1664fa1f9ff75d9e98c5f92559b5e1791fccaaa4..3e28f06b7831965d54b73ba46bbd3fae8c82a6f2 100644
--- a/lib/banzai/reference_parser/merge_request_parser.rb
+++ b/lib/banzai/reference_parser/merge_request_parser.rb
@@ -8,8 +8,6 @@ class MergeRequestParser < IssuableParser
       self.reference_type = :merge_request
 
       def nodes_visible_to_user(user, nodes)
-        return super if Feature.disabled?(:optimize_merge_request_parser, user, default_enabled: :yaml)
-
         merge_request_nodes = nodes.select { |node| node.has_attribute?(self.class.data_attribute) }
         records = projects_for_nodes(merge_request_nodes)
 
diff --git a/spec/lib/banzai/reference_parser/merge_request_parser_spec.rb b/spec/lib/banzai/reference_parser/merge_request_parser_spec.rb
index 04c35c8b0829d702099eb8835522a555c0131bac..3fbda7f32398cc632f2504ac50824e4e2f6643c2 100644
--- a/spec/lib/banzai/reference_parser/merge_request_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/merge_request_parser_spec.rb
@@ -23,14 +23,6 @@
       end
 
       it_behaves_like "referenced feature visibility", "merge_requests"
-
-      context 'when optimize_merge_request_parser feature flag is off' do
-        before do
-          stub_feature_flags(optimize_merge_request_parser: false)
-        end
-
-        it_behaves_like "referenced feature visibility", "merge_requests"
-      end
     end
   end