Removing unused props after ref_selector migration

This issue is a follow up of #386873 (closed)

Detailed description is provided in MR

Following components need to be checked for stale properties:

1. app/assets/javascripts/pages/projects/pipeline_schedules/shared/init_form.js
2. app/assets/javascripts/branches/init_new_branch_ref_selector.js
3. app/assets/javascripts/ci/pipeline_schedules/components/pipeline_schedules_form.vue
4. ee/app/assets/javascripts/on_demand_scans_form/components/on_demand_scans_form.vue
5. app/assets/javascripts/pipeline_wizard/components/commit.vue
6. app/assets/javascripts/projects/commits/index.js
7. app/assets/javascripts/projects/settings/components/default_branch_selector.vue
8. app/assets/javascripts/releases/components/tag_field_new.vue
9. app/assets/javascripts/repository/index.js
10. app/assets/javascripts/search/under_topbar/index.js
11. app/assets/javascripts/tags/init_new_tag_ref_selector.js

Property refType is no longer needed and can be removed from this components and ref_slector.vue