Removes standard resources from config tree (tgstation#34067)

* Move default.dmi to /icons

* Delete config folder before travis build

* Rename default.dmi to default_title.dmi

Add sanity check

* Remove redundant checks

code/controllers/subsystem/title.dm

@@ -26,21 +26,25 @@ SUBSYSTEM_DEF(title)
 		if((L.len == 1 && L[1] != "blank.png")|| (L.len > 1 && ((use_rare_screens && lowertext(L[1]) == "rare") || (lowertext(L[1]) == lowertext(SSmapping.config.map_name)))))
 			title_screens += S
 
-	if(!isemptylist(title_screens))
-		if(length(title_screens) > 1)
-			for(var/S in title_screens)
-				var/list/L = splittext(S,".")
-				if(L.len != 2 || L[1] != "default")
-					continue
-				title_screens -= S
-				break
-
-		file_path = "config/title_screens/images/[pick(title_screens)]"
+	for(var/S in title_screens)
+		var/list/L = splittext(S,".")
+		if(L.len != 2)
+			continue
+		title_screens -= S
+		break
 
-		icon = new(fcopy_rsc(file_path))
+	if(length(title_screens))
+		file_path = "config/title_screens/images/[pick(title_screens)]"
+
+	if(!file_path)
+		file_path = "icons/default_title.dmi"
+
+	ASSERT(fexists(file_path))
+
+	icon = new(fcopy_rsc(file_path))
 
-		if(splash_turf)
-			splash_turf.icon = icon
+	if(splash_turf)
+		splash_turf.icon = icon
 
 /datum/controller/subsystem/title/vv_edit_var(var_name, var_value)
 	. = ..()

config/title_screens/LICENSE.txt

@@ -28,11 +28,3 @@ Unless otherwise noted all images were created by Cuban Pete on July 26, 2555. T
 
 ---END EXAMPLES (NOT PART OF ANY LICENSE)---
 
-
-
-
----ADD LICENSING INFORMATION BELOW---
-
-blank.png and default.dmi use the default licensing found in README.md in the root directory of the project.
-
-

tools/travis/build_byond.sh

@@ -18,6 +18,10 @@ if [ "$BUILD_TOOLS" = false ]; then
 		grep '^var/' code/*.dm | echo
 		exit 1
 	fi;
+
+	#config folder should not be mandatory
+	rm -rf config
+
     source $HOME/BYOND-${BYOND_MAJOR}.${BYOND_MINOR}/byond/bin/byondsetup
 	if [ "$BUILD_TESTING" = true ]; then
 		tools/travis/dm.sh -DTRAVISBUILDING tgstation.dme