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/zzz_bash_post.env

@@ -1,12 +0,0 @@
-#!/usr/bin/env -S bash -c 'echo "Not a user script. source(aka .) only"'
-
-BASE_SHELL=${BASE_SHELL:-${SHELL##*/}}
-
-if [[ "${BASE_SHELL}" == "bash" ]]; then
-    eval "${SZ_ENV_BASH_LOAD_PREEXEC}"
-    if [[ -n "${BLE_VERSION-}" ]]; then
-        [[ -n "${DBG}" ]] && echo "attaching ble.sh"
-        ble-attach
-    fi
-fi
-