Remove unused Vive controller materials

Author: mtschoen

Models/Vive/Materials/ViveController.mat

@@ -12,7 +12,7 @@ Material:
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
-  m_CustomRenderQueue: -1
+  m_CustomRenderQueue: 3000
   stringTagMap:
     RenderType: Transparent
   disabledShaderPasses: []
@@ -75,7 +75,7 @@ Material:
     - _SpecularHighlights: 1
     - _SrcBlend: 5
     - _UVSec: 0
-    - _ZWrite: 1
+    - _ZWrite: 0
     m_Colors:
     - _Color: {r: 1, g: 1, b: 1, a: 1}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}