User blog:Doctor Gordon Freeman/A question about a Half life chapter

Based on the Half Life chapter Forget About Freeman, it says that there's a map removed from the game called "c4a1 ele". Is it a map used in the older versions of the game wether beta or alpha? Or maybe removed because of revisions and stuffs like that? If got information or anything about this please tell me.

P.S.:I am just asking :)