cleanup: remove unused StructureContactCompletionComponent

src/app/form/footer-form/footer-form.component.ts

src/app/form/form-view/form-view.module.ts

...ct-completion/structure-contact-completion.component.html

...tact-completion/structure-contact-completion.component.ts

...rm/form-view/structure-form/structure-form.component.html

...form/form-view/structure-form/structure-form.component.ts

...p/form/form-view/structure-form/structureFormStep.enum.ts

src/app/utils/formUtils.ts