Container build: Remove codenotary configuration (#155043)

Author: agners

build.yaml

@@ -5,9 +5,6 @@ build_from:
   armv7: ghcr.io/home-assistant/armv7-homeassistant-base:2025.10.1
   amd64: ghcr.io/home-assistant/amd64-homeassistant-base:2025.10.1
   i386: ghcr.io/home-assistant/i386-homeassistant-base:2025.10.1
-codenotary:
-  signer: notary@home-assistant.io
-  base_image: notary@home-assistant.io
 cosign:
   base_identity: https://github.com/home-assistant/docker/.*
   identity: https://github.com/home-assistant/core/.*