Some extra cleanup

com.unity.render-pipelines.core/CoreRP/ShaderLibrary/BSDF.hlsl

     // The f0 or the base should account for the new computed eta_2 on top.
     // This is optionally done if we are given the needed current ior over the base layer that is accounted for
     // in the baseLayerFresnel0 parameter:
-    if(iorOverBaseLayer > 0.0)
+    if (iorOverBaseLayer > 0.0)
     {
         // Fresnel0ToIor will give us a ratio of baseIor/topIor, hence we * iorOverBaseLayer to get the baseIor
         real3 baseIor = iorOverBaseLayer * Fresnel0ToIor(baseLayerFresnel0 + 0.0001); // guard against 1.0

com.unity.render-pipelines.high-definition/HDRP/Material/LTCAreaLight/LTCAreaLight.cs

         int m_refCounting;
 
         // For area lighting - We pack all texture inside a texture array to reduce the number of resource required
-        Texture2DArray m_LtcData; // 0: m_LtcGGXMatrix - RGBA,12: m_LtcDisneyDiffuseMatrix - RGBA
+        Texture2DArray m_LtcData; // 0: m_LtcGGXMatrix - RGBA, 1: m_LtcDisneyDiffuseMatrix - RGBA
 
         const int k_LtcLUTMatrixDim = 3; // size of the matrix (3x3)
         const int k_LtcLUTResolution = 64;

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/Lit.hlsl

 
         preLightData.coatPartLambdaV = GetSmithJointGGXPartLambdaV(NdotV, CLEAR_COAT_ROUGHNESS);
         preLightData.coatIblR = reflect(-V, N);
-
         preLightData.coatIblF = F_Schlick(CLEAR_COAT_F0, NdotV) * bsdfData.coatMask;
     }
 
     // We don't multiply by 'bsdfData.diffuseColor' here. It's done only once in PostEvaluateBSDF().
 
     // See comment for specular magnitude, it apply to diffuse as well
-#ifdef USE_DIFFUSE_LAMBERT_BRDF
-    lighting.diffuse = ltcValue;
-#else
-#endif
 
     UNITY_BRANCH if (HasFlag(bsdfData.materialFeatures, MATERIALFEATUREFLAGS_LIT_TRANSMISSION))
     {
     ltcValue *= lightData.diffuseScale;
     // We don't multiply by 'bsdfData.diffuseColor' here. It's done only once in PostEvaluateBSDF().
     // See comment for specular magnitude, it apply to diffuse as well
-#ifdef USE_DIFFUSE_LAMBERT_BRDF
-    lighting.diffuse = ltcValue;
-#else
-#endif
 
     UNITY_BRANCH if (HasFlag(bsdfData.materialFeatures, MATERIALFEATUREFLAGS_LIT_TRANSMISSION))
     {