Machine var shim (#18644)

* removal of machine var

* shimsham

* deprecation warnings

* COMSIG_LIVING_HANDLE_VISION signal

* improved

* more cleanup

* more fixes

* this is fine

* fixed radios

* notices for now, tgui fix

* cleaned up hud and vision parent calls, adds COMSIG_LIVING_HANDLE_HUD

* radios use tgui now

* guestpass does not need machine anymore

* cloning machine doesn't use it

* this arcade machine is tgui too

* autolathe does not need machine

* remaining cleanup

* doc fix

* fix

* logout handling

---------

Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/modules/holodeck/HolodeckControl.dm

@@ -82,8 +82,6 @@
 /obj/machinery/computer/HolodeckControl/attack_hand(var/mob/user as mob)
 	if(..())
 		return
-	user.set_machine(src)
-
 	tgui_interact(user)
 
 /**