fix: rm -rf $HOME if ~/.mbsyncrc when $XDG_CONFIG_HOME not defined

bin/mw

@@ -367,7 +367,7 @@ asktype() {
 
 mwpurge() {
 	confirm "delete all account data" || exit
-	rm -rf "$mwmbsyncrc" "$mwaccrcdir" "$mwconfigdir/msmtp" "${mwmbsyncrc%/*}" "$mwcachedir"
+	rm -rf "$mwmbsyncrc" "$mwaccrcdir" "$mwconfigdir/msmtp" "$mwcachedir"
 	pgrep cron >/dev/null && crontab -l | sed '/mailsync/d' | crontab - >/dev/null
 	sed -i "/\# mw-autogenerated/d" "$mwmuttrc"
 	echo "All configs and account settings have been purged."