Gateway is dead. Lets kill awaymissions and awaycontent.

[Contrabang]

Things that need removal

• /area/awaymission and subtypes
• /area/awaycontent and subtypes
• beach.dmm
• Comments containing "Awaymission"
• /datum/implant_fluff/exile needs updating
• /obj/item/storage/box/exileimp desc needs updating
• /mob/living/carbon/human/handle_disabilities() "gATEway LoOt" (honestly, maybe not on this one. Its still kinda funny)
• Update /obj/item/rcs/proc/random_coords()
• other random gateway comments
• spider_awaymission variable
• ts_count_alive_awaymission global variable

Actually theres a ton of random global ts variables that could simplified, removed, or defined if someone wants to do that too