removed isSky from template sky material files.

Templates/BaseGame/game/tools/base/images/materials.cs

@@ -16,7 +16,6 @@ singleton CubemapData( BlankSkyCubemap )
 singleton Material( BlankSkyMat )
 {
    cubemap = BlankSkyCubemap;
-   isSky = true;
 };
 
 singleton Material(White)

Templates/Full/game/art/skies/Desert_Sky/materials.cs

@@ -34,5 +34,4 @@ singleton Material( DesertSkyMat )
 {
    cubemap = DesertSkyCubemap;
    materialTag0 = "Skies";
-   isSky = true;
 };

Templates/Full/game/art/skies/night/materials.cs

@@ -34,7 +34,6 @@ singleton Material( NightSkyMat )
 {
    cubemap = NightCubemap;
    materialTag0 = "Skies";
-   isSky = true;
 };
 
 singleton Material( Moon_Glow_Mat )
@@ -51,5 +50,4 @@ singleton Material( Moon_Mat )
    emissive = true;
    translucent = true;
    vertColor[ 0 ] = true;
-   isSky = true;
 };

Templates/Full/game/core/art/skies/blank/materials.cs

@@ -34,7 +34,6 @@ singleton Material( BlackSkyMat )
 {
    cubemap = BlackSkyCubemap;
    materialTag0 = "Skies";
-   isSky = true;
 };
 
 singleton CubemapData( BlueSkyCubemap )