Remove IntegrateGgxWithoutFresnel()

ScriptableRenderPipeline/Core/ShaderLibrary/ImageBasedLighting.hlsl

     return acc / sampleCount;
 }
 
-float IntegrateGgxWithoutFresnel(float3 V, float3 N, float roughness, uint sampleCount = 4096)
-{
-    float NdotV = saturate(dot(N, V));
-    float total = 0;
-
-    float3x3 localToWorld = GetLocalFrame(N);
-
-    for (uint i = 0; i < sampleCount; ++i)
-    {
-        float2 u = Golden2dSeq(i, sampleCount);
-
-        float3 L;
-        float VdotH, NdotL, weight;
-
-        // Compute Weight = BSDF * NdotL / PDF. F = 1.
-        ImportanceSampleGGX(u, V, localToWorld, roughness, NdotV, L, VdotH, NdotL, weight);
-
-        if (NdotL > 0.0)
-        {
-            total += weight;
-        }
-    }
-
-    return saturate(total * rcp(sampleCount));
-}
-
 uint GetIBLRuntimeFilterSampleCount(uint mipLevel)
 {
     uint sampleCount = 0;