prepare for symclone.

From now on, _src.posix will be the single source of truth.
And _home(.*) will symlink into it.

_home/private_dot_config/sz.env/zza_atuin.env

@@ -1,17 +0,0 @@
-#!/usr/bin/env -S bash -c 'echo "Not a user script. source(aka .) only"'
-
-BASE_SHELL=${BASE_SHELL:-${SHELL##*/}}
-
-if is_cmd atuin; then
-    if [[ "${BASE_SHELL}" == "bash" ]] && ! [[ -n "$SZ_ENV_BASH_LOAD_PREEXEC$BLE_VERSION" ]]; then
-        printf '%s\n' \
-            'atuin was found, but bash-preexec or ble.sh are not loaded,' \
-            'to load atuin, first run update-ble.sh or update-bash-preexec ' \
-            'then relaod (_r) the shell.'
-    fi
-
-    . <( atuin init "${BASE_SHELL}" )
-    . <( atuin gen-completions --shell ${BASE_SHELL} )
-
-    [[ -n "${DBG}" ]] && echo "atuin loaded."
-fi