HDRenderPipeline: Remove vertex and pixel displacement on tessellation

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/LayeredLit/LayeredLitTessellation.shader

         [HideInInspector] _DoubleSidedConstants("_DoubleSidedConstants", Vector) = (1, 1, -1, 0)
 
     	[Enum(Subsurface Scattering, 0, Standard, 1)] _MaterialID("MaterialId", Int) = 1 // MaterialId.RegularLighting
-        [Enum(None, 0, Vertex displacement, 1, Pixel displacement, 2, Tessellation displacement, 3)] _DisplacementMode("DisplacementMode", Int) = 0
+        [Enum(None, 0, Tessellation displacement, 3)] _DisplacementMode("DisplacementMode", Int) = 3
         [ToggleOff] _DisplacementLockObjectScale("displacement lock object scale", Float) = 1.0
         [ToggleOff] _DisplacementLockTilingScale("displacement lock tiling scale", Float) = 1.0
         [ToggleOff] _DepthOffsetEnable("Depth Offset View space", Float) = 0.0

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Lit/LitTessellation.shader

 
         [Enum(Subsurface Scattering, 0, Standard, 1, Anisotropy, 2, ClearCoat, 3, Specular Color, 4)] _MaterialID("MaterialId", Int) = 1 // MaterialId.RegularLighting
 
-        [Enum(None, 0, Vertex displacement, 1, Pixel displacement, 2, Tessellation displacement, 3)] _DisplacementMode("DisplacementMode", Int) = 0
+        [Enum(None, 0, Tessellation displacement, 3)] _DisplacementMode("DisplacementMode", Int) = 3
         [ToggleOff] _DisplacementLockObjectScale("displacement lock object scale", Float) = 1.0
         [ToggleOff] _DisplacementLockTilingScale("displacement lock tiling scale", Float) = 1.0
         [ToggleOff] _DepthOffsetEnable("Depth Offset View space", Float) = 0.0