Remove SpriteMaterial.fog (en doc)

docs/api/en/materials/SpriteMaterial.html

@@ -66,9 +66,6 @@
 		<h3>[property:Color color]</h3>
 		<p>[page:Color] of the material, by default set to white (0xffffff). The [page:.map] is mutiplied by the color.</p>
 
-		<h3>[property:boolean fog]</h3>
-		<p>Whether or not this material affected by the scene's fog. Default is true</p>
-
 		<h3>[property:Texture map]</h3>
 		<p>The texture map. Default is null.</p>