Remove dependency on thread_safe
Remove dependency on thread_safe

We only use it for memory adapter and it may cause version conflicts and
prevent people from using ROM when they don't really need memory
adapter. Which is silly

jeremyf/rom,pxlpnk/rom,rom-rb/rom,dcarral/rom,endash/rom,rom-rb/rom,denyago/rom,vrish88/rom,rom-rb/rom,Snuff/rom,pvcarrera/rom,dekz/rom,kwando/rom,cored/rom