You can delete custom question templates that you created but not default question templates. 

  1. Click  in the toolbar of question types.

  2. Click the name of the custom question template that you want to delete. 
    Note: You cannot delete the default question templates (Multiple Choice, Range, Yes/No).
  3. Click on Manage Question Templates, then click the trash icon for the template that you want to delete. Deleting a question template has no effect on the forms and you are not asked to verify your decision to delete.