Remove completed TODOs

Assets/ScriptableRenderLoop/HDRenderLoop/Material/Lit/Lit.hlsl

         }
 
     #ifndef DIFFUSE_LAMBERT_BRDF
-        // TODO: verify that we do not need to multiply by PI.
         ltcValue *= preLightData.ltcDisneyDiffuseMagnitude;
     #endif
 
         ltcValue *= lightData.specularScale;
         specularLighting = fresnelTerm * lightData.color * ltcValue;
     }
-
-    // TODO: current area light code doesn't take into account artist attenuation radius!
-
 #endif
 }