More MeshDepthMaterial clean up.

src/renderers/shaders/ShaderLib.js

@@ -174,8 +174,6 @@ THREE.ShaderLib = {
 			THREE.UniformsLib[ 'displacementmap' ],
 
 			{
-				"mNear": { type: "1f", value: 1.0 },
-				"mFar" : { type: "1f", value: 2000.0 },
 				"opacity" : { type: "1f", value: 1.0 }
 			}