fix(install): remove unnecessary config bootstrap

Relay auth (auth.automagik.dev) is already the build-time default in the
binary — no need to set callback_server or keyring_backend from the
installer. Zero config, just works.

Author: automagik-genie

install.sh

@@ -279,13 +279,6 @@ else
     info "Binary unchanged at ${TARGET}"
 fi
 
-# ---------------------------------------------------------------------------
-# Bootstrap config (relay auth — no GCP setup needed)
-# ---------------------------------------------------------------------------
-"$TARGET" config set callback_server https://auth.automagik.dev 2>/dev/null
-"$TARGET" config set keyring_backend file 2>/dev/null
-ok "Config: relay auth via auth.automagik.dev"
-
 # ---------------------------------------------------------------------------
 # Plugin download and install
 # ---------------------------------------------------------------------------