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/bbb_ble.sh.env

@@ -1,26 +0,0 @@
-#!/usr/bin/env -S bash -c 'echo "Not a user script. source(aka .) only"'
-
-BASE_SHELL=${BASE_SHELL:-${SHELL##*/}}
-
-if [[ "${BASE_SHELL}" == "bash" ]]; then
-    update-ble.sh() {
-        [[ -n "${DBG}" ]] && set -x
-        local workdir="$SZ_ENV_ROOT/lib/ble.sh.curl"
-        [ -d "$workdir" ] && rm -fR "$workdir"
-        mkdir -p "$workdir"
-        
-        cd "$workdir"
-        curl -L https://github.com/akinomyoga/ble.sh/releases/download/nightly/ble-nightly.tar.xz | tar xJf -
-        
-        source "$workdir/ble-nightly/ble.sh"
-        [[ -n "${DBG}" ]] && set +x
-    }
-    if [ -f "$SZ_ENV_ROOT/lib/ble.sh.curl/ble-nightly/ble.sh" ]; then
-        source "$SZ_ENV_ROOT/lib/ble.sh.curl/ble-nightly/ble.sh" --noattach
-    fi
-    
-    if [[ -n "${DBG}" && -n "${BLE_VERSION-}" ]]; then
-        echo "ble.sh will be loaded."
-    fi
-fi
-