Removed declaration of u_ambientColor in new project box.material

gameplay-template/res/box.material

@@ -11,7 +11,6 @@ material box
             // uniforms
             u_worldViewProjectionMatrix = WORLD_VIEW_PROJECTION_MATRIX
             u_inverseTransposeWorldViewMatrix = INVERSE_TRANSPOSE_WORLD_VIEW_MATRIX
-            u_ambientColor = 0.2, 0.2, 0.2
             u_diffuseColor = 1.0, 1.0, 1.0, 1.0
 
             // render state