remove protokinetic grenade launcher (#6258)

## About The Pull Request

requested by dexee

## Changelog
:cl:
del: Removed the proto-kinetic grenade launcher.
/:cl:

Author: Absolucy

code/game/machinery/computer/orders/order_items/mining/order_pka.dm

@@ -25,10 +25,6 @@
 	item_path = /obj/item/gun/energy/recharge/kinetic_accelerator/railgun
 	cost_per_order = 1250
 
-/datum/orderable_item/accelerator/gun/m79 //monke edit
-	item_path = /obj/item/gun/energy/recharge/kinetic_accelerator/m79
-	cost_per_order = 1250
-
 /datum/orderable_item/accelerator/range
 	item_path = /obj/item/borg/upgrade/modkit/range
 	cost_per_order = 1000

code/modules/projectiles/guns/energy/kinetic_accelerator.dm

@@ -573,7 +573,6 @@
 /obj/item/borg/upgrade/modkit/chassis_mod/install(obj/item/gun/energy/recharge/kinetic_accelerator/KA, mob/user)
 //monkestation edit start
 	if(is_type_in_list(KA, list(/obj/item/gun/energy/recharge/kinetic_accelerator/glock,
-								/obj/item/gun/energy/recharge/kinetic_accelerator/m79,
 								/obj/item/gun/energy/recharge/kinetic_accelerator/meme,
 								/obj/item/gun/energy/recharge/kinetic_accelerator/railgun,
 								/obj/item/gun/energy/recharge/kinetic_accelerator/repeater,

monkestation/code/modules/mining/accelerators/grenade.dm

@@ -7692,7 +7692,6 @@
 #include "monkestation\code\modules\microfusion\code\projectiles.dm"
 #include "monkestation\code\modules\mining\accelerators\_wastes_pin.dm"
 #include "monkestation\code\modules\mining\accelerators\admin.dm"
-#include "monkestation\code\modules\mining\accelerators\grenade.dm"
 #include "monkestation\code\modules\mining\accelerators\pistol.dm"
 #include "monkestation\code\modules\mining\accelerators\railgun.dm"
 #include "monkestation\code\modules\mining\accelerators\repeater.dm"