def begin_delete(resource_group_name, gallery_name, gallery_image_name, custom_headers:nil)
      response = begin_delete_async(resource_group_name, gallery_name, gallery_image_name, custom_headers:custom_headers).value!
      nil
    end
def begin_delete(resource_group_name, gallery_name, gallery_image_name, custom_headers:nil)
      response = begin_delete_async(resource_group_name, gallery_name, gallery_image_name, custom_headers:custom_headers).value!
      nil
    end
Delete a gallery image.

 @param resource_group_name [String] The name of the resource group.
 @param gallery_name [String] The name of the Shared Image Gallery in which
 the Image Definition is to be deleted.
 @param gallery_image_name [String] The name of the gallery Image Definition
 to be deleted.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.