removed "onlyShadow" property from docu

docs/api/lights/DirectionalLight.html

@@ -63,12 +63,6 @@ scene.add( directionalLight );</code>
 			Default — *1.0*.
 		</div>
 
-		<h3>[property:Boolean onlyShadow]</h3>
-		<div>
-			If set to *true* light will only cast shadow but not contribute any lighting (as if *intensity* was 0 but cheaper to compute).<br />
-			Default — *false*.
-		</div>
-
 		<h3>[property:Boolean castShadow]</h3>
 		<div>
 			If set to true light will cast dynamic shadows. Warning: This is expensive and requires tweaking to get shadows looking right.<br />

docs/api/lights/SpotLight.html

@@ -111,12 +111,6 @@
 			Default — *false*.
 		</div>
 
-		<h3>[property:Boolean onlyShadow]</h3>
-		<div>
-			If set to *true* light will only cast shadow but not contribute any lighting (as if *intensity* was 0 but cheaper to compute).<br />
-			Default — *false*.
-		</div>
-		
 		<h3>[property:Float shadowCameraNear]</h3>
 		<div>
 			Perspective shadow camera frustum <em>near</em> parameter.<br />