Remove the arbitrary 'maxDisplacement' scale

Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/LitData.hlsl

 #endif
 #endif
 
-    // TODO: explain this 0.5 factor. It is likely related to the fact that
-    // setting the amplitude to 2 in the UI only results in the max. displacement of 1.
-    return 0.5 * maxDisplacement;
+    return maxDisplacement;
 }
 
 // Return the minimun uv size for all layers including triplanar