fix(hosts): Remove rage from devenv tools

cargo-binstall finds no prebuilt binary for rage and refuses to fall back
to cargo install, so mise compiles it from source, which slows down the
bootstrap and logs an error. The tool is not used yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DNFVa9coYSXpUrxogVwSiG

.chezmoidata/hosts.yaml

@@ -51,7 +51,6 @@ hosts:
         tools:
           - sops
           - age
-          - cargo:rage
         configs: {}
   # Termux (application de terminal pour android)
   termux-debian: