Cleanup redundant machine stuff (#18494)

code/game/objects/items/devices/radio/headset.dm

@@ -359,7 +359,7 @@
 
 /obj/item/radio/headset/attackby(obj/item/W as obj, mob/user as mob)
 	if(istype(W, /obj/item/encryptionkey/))
-		user.set_machine(src)
+
 		if(keyslot1 && keyslot2)
 			to_chat(user, "The headset can't hold another key!")
 			return
@@ -372,15 +372,17 @@
 			user.drop_item()
 			W.loc = src
 			keyslot2 = W
+
 		recalculateChannels()
-	else
-		return ..()
+		return
+
+	return ..()
 
 /obj/item/radio/headset/screwdriver_act(mob/user, obj/item/I)
 	. = TRUE
 	if(!I.use_tool(src, user, 0, volume = 0))
 		return
-	user.set_machine(src)
+
 	if(keyslot1 || keyslot2)
 
 		for(var/ch_name in channels)

code/game/objects/items/devices/radio/radio.dm

@@ -563,13 +563,14 @@ GLOBAL_LIST_INIT(default_medbay_channels, list(
 	. = TRUE
 	if(!I.use_tool(src, user, 0, volume = I.tool_volume))
 		return
-	user.set_machine(src)
+
 	b_stat = !b_stat
 	if(!istype(src, /obj/item/radio/beacon))
 		if(b_stat)
 			user.show_message("<span class='notice'>The radio can now be attached and modified!</span>")
 		else
 			user.show_message("<span class='notice'>The radio can no longer be modified or attached!</span>")
+
 		updateDialog()
 
 /obj/item/radio/wirecutter_act(mob/user, obj/item/I)
@@ -663,7 +664,7 @@ GLOBAL_LIST_INIT(default_medbay_channels, list(
 
 /obj/item/radio/borg/attackby(obj/item/W as obj, mob/user as mob, params)
 	if(istype(W, /obj/item/encryptionkey/))
-		user.set_machine(src)
+
 		if(keyslot)
 			to_chat(user, "The radio can't hold another key!")
 			return
@@ -674,14 +675,15 @@ GLOBAL_LIST_INIT(default_medbay_channels, list(
 			keyslot = W
 
 		recalculateChannels()
-	else
-		return ..()
+		return
+
+	return ..()
 
 /obj/item/radio/borg/screwdriver_act(mob/user, obj/item/I)
 	. = TRUE
 	if(!I.use_tool(src, user, 0, volume = 0))
 		return
-	user.set_machine(src)
+
 	if(keyslot)
 		for(var/ch_name in channels)
 			SSradio.remove_object(src, SSradio.radiochannels[ch_name])

code/game/objects/items/weapons/rpd.dm

@@ -173,7 +173,6 @@
 	ui_interact(user)
 
 /obj/item/rpd/ui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = FALSE, datum/tgui/master_ui = null, datum/ui_state/state = GLOB.inventory_state)
-	user.set_machine(src)
 	ui = SStgui.try_update_ui(user, src, ui_key, ui, force_open)
 	if(!ui)
 		ui = new(user, src, ui_key, "RPD", name, 450, 650, master_ui, state)