Actually fixes mining maps lol (#4968)

* Update mining_maps.dm

* Update mining_maps.dm

* a

* aaa

* aaaa

* Update mining_maps.dm

* aaaaa

code/controllers/subsystem/mapping.dm

@@ -281,7 +281,7 @@ Used by the AI doomsday and the self-destruct nuke.
 	var/mining_traits_to_load = GLOB.mining_traits[SSrandommining.traits]
 
 	if(mining_map_to_load)
-		add_startupmessage("MINING MAP: Loading random mining level...")
+		add_startupmessage("MINING MAP: Loading mining level...")
 		if(!mining_traits_to_load)
 			add_startupmessage("MINING MAP ERROR: No z-level traits detected, loading without traits.")
 		LoadGroup(FailedZs, "Mining Level", "map_files/Mining", mining_map_to_load, default_traits = mining_traits_to_load)

code/controllers/subsystem/vote.dm

@@ -132,7 +132,9 @@ SUBSYSTEM_DEF(vote)
 				SSmapping.map_voted = TRUE
 			//SKYRAT EDIT ADDITION BEGIN
 			if("mining_map")
-				SSrandommining.voted_next_map = .
+				SSrandommining.voted_next_map = TRUE
+				if(fexists("data/next_mining.dat"))
+					fdel("data/next_mining.dat")
 				var/F = file("data/next_mining.dat")
 				WRITE_FILE(F, .)
 			if("transfer")