Remove reference to matrix-registration from matrix-user-verification-service/defaults/main.yml

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

roles/custom/matrix-user-verification-service/defaults/main.yml

@@ -18,7 +18,7 @@ matrix_user_verification_service_enabled: true
 
 matrix_user_verification_service_container_image_self_build: "{{ matrix_architecture != 'amd64' }}"
 matrix_user_verification_service_container_image_self_build_repo: "https://github.com/matrix-org/matrix-user-verification-service"
-matrix_user_verification_service_container_image_self_build_branch: "{{ 'master' if matrix_registration_version == 'latest' else matrix_user_verification_service_version }}"
+matrix_user_verification_service_container_image_self_build_branch: "{{ matrix_user_verification_service_version }}"
 
 # renovate: datasource=docker depName=matrixdotorg/matrix-user-verification-service
 matrix_user_verification_service_version: "v3.0.0"