Revert "Add the option to restrict the Engine that spawn"

This reverts commit e3e1f91635.

code/controllers/configuration/config_entry.dm

@@ -151,7 +151,6 @@
 	var/key_mode
 	var/value_mode
 	var/splitter = " "
-	var/lowercase = TRUE
 
 /datum/config_entry/keyed_list/New()
 	. = ..()
@@ -168,8 +167,7 @@
 	var/key_value = null
 
 	if(key_pos || value_mode == VALUE_MODE_FLAG)
-		if(lowercase)
-			key_name = lowertext(copytext(str_val, 1, key_pos))
+		key_name = lowertext(copytext(str_val, 1, key_pos))
 		key_value = copytext(str_val, key_pos + 1)
 		var/new_key
 		var/new_value

code/controllers/configuration/entries/game_options.dm

@@ -379,9 +379,3 @@
 /datum/config_entry/number/auto_transfer_delay
 	config_entry_value = 72000
 	min_val = 0
-
-/datum/config_entry/keyed_list/box_random_engine
-	key_mode = KEY_MODE_TEXT
-	value_mode = VALUE_MODE_TEXT
-	lowercase = FALSE
-	splitter = "-"