Remove dismissal info fallback methods from the `Vulnerability` model

ee/app/models/ee/vulnerability.rb

@@ -139,19 +139,6 @@ module EE
         findings.first
       end
 
-      # TODO: Remove this attribute reader overrides with #262112
-      def dismissed_at
-        return unless dismissed?
-
-        super || fallback_dismissal_feedback&.created_at
-      end
-
-      def dismissed_by_id
-        return unless dismissed?
-
-        super || fallback_dismissal_feedback&.author_id
-      end
-
       def resource_parent
         project
       end
@@ -179,15 +166,6 @@ module EE
       def user_notes_count_service
         @user_notes_count_service ||= ::Vulnerabilities::UserNotesCountService.new(self) # rubocop: disable CodeReuse/ServiceClass
       end
-
-      # TODO: Remove this with #262112
-      def fallback_dismissal_feedback
-        strong_memoize(:fallback_dismissal_feedback) do
-          ::Gitlab::AppJsonLogger.warn(message: 'Fallback dismissal_feedback has been called!', vulnerability_id: id)
-
-          finding&.dismissal_feedback
-        end
-      end
     end
 
     class_methods do

ee/spec/models/ee/vulnerability_spec.rb

@@ -674,138 +674,6 @@ RSpec.describe Vulnerability do
     end
   end
 
-  describe '#dismissed_at' do
-    let_it_be(:project) { create(:project) }
-    let_it_be(:finding) do
-      create(
-        :vulnerabilities_finding,
-        report_type: :dependency_scanning,
-        project: project
-      )
-    end
-
-    let(:vulnerability) { create(:vulnerability, findings: [finding]) }
-    let(:feedback_created_at) { -2.days.from_now }
-    let!(:dismissal_feedback) do
-      create(
-        :vulnerability_feedback,
-        :dependency_scanning,
-        :dismissal,
-        project: project,
-        project_fingerprint: finding.project_fingerprint,
-        created_at: feedback_created_at
-      )
-    end
-
-    subject(:dismissed_at) { vulnerability.dismissed_at }
-
-    around do |example|
-      freeze_time { example.run }
-    end
-
-    context 'when the vulnerability is not dismissed' do
-      before do
-        vulnerability.update_attribute(:dismissed_at, Time.current)
-      end
-
-      it { is_expected.to be_nil }
-    end
-
-    context 'when the vulnerability is dismissed' do
-      before do
-        vulnerability.dismissed!
-      end
-
-      context 'when the `dismissed_at` exists' do
-        let(:vulnerability_dismissed_at) { -1.day.from_now }
-
-        before do
-          vulnerability.update_attribute(:dismissed_at, vulnerability_dismissed_at)
-        end
-
-        it { is_expected.to eq(vulnerability_dismissed_at) }
-      end
-
-      context 'when the `dismissed_at` does not exist' do
-        before do
-          allow(::Gitlab::AppJsonLogger).to receive(:warn)
-        end
-
-        it { is_expected.to eq(feedback_created_at) }
-
-        it 'puts a warning log' do
-          dismissed_at
-
-          expect(::Gitlab::AppJsonLogger).to have_received(:warn)
-        end
-      end
-    end
-  end
-
-  describe '#dismissed_by_id' do
-    let_it_be(:user_1) { create(:user) }
-    let_it_be(:user_2) { create(:user) }
-    let_it_be(:project) { create(:project) }
-    let_it_be(:occurrence) do
-      create(
-        :vulnerabilities_finding,
-        report_type: :dependency_scanning,
-        project: project
-      )
-    end
-
-    let_it_be(:dismissal_feedback) do
-      create(
-        :vulnerability_feedback,
-        :dependency_scanning,
-        :dismissal,
-        project: project,
-        project_fingerprint: occurrence.project_fingerprint,
-        author: user_1
-      )
-    end
-
-    let(:vulnerability) { create(:vulnerability, findings: [occurrence]) }
-
-    subject(:dismissed_by_id) { vulnerability.dismissed_by_id }
-
-    context 'when the vulnerability is not dismissed' do
-      before do
-        vulnerability.update_attribute(:dismissed_by_id, user_1.id)
-      end
-
-      it { is_expected.to be_nil }
-    end
-
-    context 'when the vulnerability is dismissed' do
-      before do
-        vulnerability.dismissed!
-      end
-
-      context 'when the `dismissed_by_id` exists' do
-        before do
-          vulnerability.update_attribute(:dismissed_by_id, user_2.id)
-        end
-
-        it { is_expected.to eq(user_2.id) }
-      end
-
-      context 'when the `dismissed_by_id` does not exist' do
-        before do
-          allow(::Gitlab::AppJsonLogger).to receive(:warn)
-        end
-
-        it { is_expected.to eq(user_1.id) }
-
-        it 'puts a warning log' do
-          dismissed_by_id
-
-          expect(::Gitlab::AppJsonLogger).to have_received(:warn)
-        end
-      end
-    end
-  end
-
   describe '#user_notes_count' do
     let_it_be(:vulnerability) { create(:vulnerability) }