Merge pull request #2185 from John3/old_dml

delete old dml

Templates/BaseGame/game/tools/base/images/sky_skybox.dml

@@ -1,7 +0,0 @@
-skybox_1
-skybox_2
-skybox_3
-skybox_4
-skybox_5
-skybox_6
-skybox_6