Cleans up .rej spam and the empty file from #2792 (#2818)

* Cleans up .rej spam and the empty file from #2792

* Update tgstation.dme

code/modules/mob/dead/new_player/login.dm.rej

@@ -1,9 +0,0 @@
-diff a/code/modules/mob/dead/new_player/login.dm b/code/modules/mob/dead/new_player/login.dm	(rejected hunks)
-@@ -1,5 +1,6 @@
- /mob/dead/new_player/Login()
--	client.update_exp_client(0, 0)
-+	if(config.use_exp_tracking)
-+		client.update_exp_client(0, 0)
- 	if(!mind)
- 		mind = new /datum/mind(key)
- 		mind.active = 1

code/modules/mob/living/silicon/ai/death.dm.rej

@@ -1,13 +0,0 @@
-diff a/code/modules/mob/living/silicon/ai/death.dm b/code/modules/mob/living/silicon/ai/death.dm	(rejected hunks)
-@@ -35,9 +35,9 @@
- 	if(nuking)
- 		set_security_level("red")
- 		nuking = FALSE
--		for(var/obj/item/weapon/pinpointer/P in GLOB.pinpointer_list)
-+		for(var/obj/item/weapon/pinpointer/nuke/P in GLOB.pinpointer_list)
- 			P.switch_mode_to(TRACK_NUKE_DISK) //Party's over, back to work, everyone
--			P.nuke_warning = FALSE
-+			P.alert = FALSE
- 
- 	if(doomsday_device)
- 		doomsday_device.timing = FALSE

code/modules/mob/living/silicon/robot/robot_modules.dm.rej

@@ -1,19 +0,0 @@
-diff a/code/modules/mob/living/silicon/robot/robot_modules.dm b/code/modules/mob/living/silicon/robot/robot_modules.dm	(rejected hunks)
-@@ -519,7 +519,7 @@
- 		/obj/item/weapon/gun/ballistic/revolver/grenadelauncher/cyborg,
- 		/obj/item/weapon/card/emag,
- 		/obj/item/weapon/crowbar/cyborg,
--		/obj/item/weapon/pinpointer/syndicate/cyborg)
-+		/obj/item/weapon/pinpointer/syndicate_cyborg)
- 
- 	ratvar_modules = list(
- 		/obj/item/clockwork/slab/cyborg/security,
-@@ -545,7 +545,7 @@
- 		/obj/item/roller/robo,
- 		/obj/item/weapon/card/emag,
- 		/obj/item/weapon/crowbar/cyborg,
--		/obj/item/weapon/pinpointer/syndicate/cyborg,
-+		/obj/item/weapon/pinpointer/syndicate_cyborg,
- 		/obj/item/stack/medical/gauze/cyborg,
- 		/obj/item/weapon/gun/medbeam)
- 	ratvar_modules = list(