Removes some boiler plate from working with atmos code (#58885)

Everything that called turf.assume_air and turf.remove_air was already updating turfs, and all that not tying

the two together did was add more boiler plate, and break things when people forgot about it.

This shouldn't add any overhead outside of hotspots, but I think that's trivial

code/modules/assembly/bomb.dm

@@ -200,8 +200,6 @@
 		ground_zero.assume_air(bomb_mixture)
 		ground_zero.hotspot_expose(1000, 125)
 
-	ground_zero.air_update_turf(FALSE, FALSE)
-
 /obj/item/tank/proc/release() //This happens when the bomb is not welded. Tank contents are just spat out.
 	var/datum/gas_mixture/our_mix = return_air()
 	var/datum/gas_mixture/removed = remove_air(our_mix.total_moles())
@@ -209,7 +207,6 @@
 	if(!T)
 		return
 	T.assume_air(removed)
-	air_update_turf(FALSE, FALSE)
 
 /obj/item/onetankbomb/return_analyzable_air()
 	if(bombtank)