WIP: slapos_jio*: Drop unused instance and code
it cause confusion on grep and search, if we need access its code, we may rely on https://lab.nexedi.com/nexedi/slapos.core/-/tree/master/master/bt5/slapos_jio
it cause confusion on grep and search, if we need access its code, we may rely on https://lab.nexedi.com/nexedi/slapos.core/-/tree/master/master/bt5/slapos_jio