Remove all instance of bombers. Replace "bomber list" in secrets with "bombs" in investigate. Remove useless clear bomb function.

code/modules/admin/topic.dm

@@ -2957,13 +2957,6 @@
 
 		var/ok = 0
 		switch(href_list["secretsadmin"])
-			if("clear_bombs")
-				//I do nothing
-			if("list_bombers")
-				var/dat = "<B>Bombing List<HR>"
-				for(var/l in bombers)
-					dat += text("[l]<BR>")
-				usr << browse(dat, "window=bombers")
 			if("list_signalers")
 				var/dat = "<B>Showing last [length(lastsignalers)] signalers.</B><HR>"
 				for(var/sig in lastsignalers)