update unsubmit to remove ed references on applicants (#4546)

components/financial_assistance/app/models/financial_assistance/application.rb

@@ -1779,6 +1779,11 @@ def build_eligibility_determinations
 
     def delete_eligibility_determinations
       eligibility_determinations.destroy_all
+      applicants.each do |applicant|
+        applicant.eligibility_determination_id = nil
+        applicant.tax_filer_kind = nil
+      end
+      self.save!
     end
 
     def create_evidences

components/financial_assistance/spec/models/financial_assistance/application_spec.rb

@@ -1043,6 +1043,14 @@
             it 'should transition application to renewal_draft' do
               expect(application.reload.renewal_draft?).to be_truthy
             end
+
+            it 'applicants should not have eligibility determination references' do
+              expect(application.applicants.pluck(:eligibility_determination_id).uniq).to eq [nil]
+            end
+
+            it 'applicants should not have tax_filer_kind' do
+              expect(application.applicants.pluck(:tax_filer_kind).uniq).to eq [nil]
+            end
           end
 
           context 'guard failure' do