Remove the Project#to_reference_with_postfix method since it is only used in...

Remove the Project#to_reference_with_postfix method since it is only used in the project_reference_filter_spec

app/models/project.rb

@@ -904,10 +904,6 @@ class Project < ActiveRecord::Base
     end
   end
 
-  def to_reference_with_postfix
-    "#{to_reference(full: true)}#{self.class.reference_postfix}"
-  end
-
   # `from` argument can be a Namespace or Project.
   def to_reference(from = nil, full: false)
     if full || cross_namespace_reference?(from)

spec/lib/banzai/filter/project_reference_filter_spec.rb

@@ -8,7 +8,7 @@ describe Banzai::Filter::ProjectReferenceFilter do
   end
 
   def get_reference(project)
-    project.to_reference_with_postfix
+    "#{project.to_reference(full: true)}#{Project.reference_postfix}"
   end
 
   let(:project)   { create(:project, :public) }

spec/models/project_spec.rb

@@ -344,15 +344,6 @@ describe Project do
     it { is_expected.to delegate_method(:name).to(:owner).with_prefix(true).with_arguments(allow_nil: true) }
   end
 
-  describe '#to_reference_with_postfix' do
-    it 'returns the full path with reference_postfix' do
-      namespace = create(:namespace, path: 'sample-namespace')
-      project = create(:project, path: 'sample-project', namespace: namespace)
-
-      expect(project.to_reference_with_postfix).to eq 'sample-namespace/sample-project>'
-    end
-  end
-
   describe '#to_reference' do
     let(:owner)     { create(:user, name: 'Gitlab') }
     let(:namespace) { create(:namespace, path: 'sample-namespace', owner: owner) }