Remove map.customtrinkets

This variable's sole purpose is to copy ed.numtrinkets, even though ed
has always been a name that's been accessible globally. So let's not
dupe cope.

desktop_version/src/Script.cpp

@@ -1887,11 +1887,13 @@ void scriptclass::run()
 				graphics.textboxcenterx();
 
 				std::string usethisnum;
+#if !defined(NO_CUSTOM_LEVELS)
 				if (map.custommode)
 				{
-					usethisnum = help.number(map.customtrinkets);
+					usethisnum = help.number(ed.numtrinkets);
 				}
 				else
+#endif
 				{
 					usethisnum = "Twenty";
 				}