Remove `cinny_container_image_registry_prefix_*`

Signed-off-by: Suguru Hirahara <did🔑z6MkvVZk1A3KBApWJXv2Ju4H14ErDfRGxh8zxdXSZ4vACDg5>

roles/custom/matrix-client-cinny/defaults/main.yml

@@ -19,8 +19,6 @@ cinny_container_image_self_build_repo: "https://github.com/ajbura/cinny.git"
 # renovate: datasource=docker depName=ajbura/cinny
 cinny_version: v4.10.2
 cinny_container_image: "{{ cinny_container_image_registry_prefix }}ajbura/cinny:{{ cinny_version }}"
-cinny_container_image_registry_prefix: "{{ 'localhost/' if cinny_container_image_self_build else cinny_container_image_registry_prefix_upstream }}"
-cinny_container_image_registry_prefix_upstream: "{{ cinny_container_image_registry_prefix_upstream_default }}"
 cinny_container_image_registry_prefix_upstream_default: docker.io/
 cinny_container_image_force_pull: "{{ cinny_container_image.endswith(':latest') }}"