Minor clean up

Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/SubsurfaceScattering.compute

 
 void EvaluateSample(uint i, uint n, uint profileID, uint iR, uint iP, float2 centerCoord, int2 cacheAnchor,
                     float3 shapeParam, float3 centerPosVS, float mmPerUnit, float2 pixelsPerMm,
-                    bool useTangentPlane, float3 tangentX, float3 tangentY, float4x4 projMatrix,
+                    float3 tangentX, float3 tangentY, float4x4 projMatrix,
                     inout float3 totalIrradiance, inout float3 totalWeight)
 {
     float  r   = _FilterKernels[profileID][i][iR];
     // Compute the screen-space position and the squared distance (in mm) in the image plane.
     int2 position; float xy2;
 
-    if (useTangentPlane)
-    {
+    #if SSS_USE_TANGENT_PLANE != 0
         float3 relPosVS   = vec.x * tangentX + vec.y * tangentY;
         float3 positionVS = centerPosVS + relPosVS;
         float4 positionCS = mul(projMatrix, float4(positionVS, 1));
         xy2      = dot(relPosVS.xy, relPosVS.xy);
-    }
-    else
-    {
+    #else
-    }
+    #endif
 
     float4 textureSample = LoadSample(position, cacheAnchor);
     float3 irradiance    = textureSample.rgb;
             return;
     }
 
-    bool useTangentPlane = SSS_USE_TANGENT_PLANE != 0;
-
     float4x4 viewMatrix, projMatrix;
     GetLeftHandedViewSpaceMatrices(viewMatrix, projMatrix);
 
         // Integrate over the image or tangent plane in the view space.
         EvaluateSample(i, n, profileID, iR, iP, pixelCoord + 0.5, cacheAnchor,
                        shapeParam, centerPosVS, mmPerUnit, pixelsPerMm,
-                       useTangentPlane, tangentX, tangentY, projMatrix,
+                       tangentX, tangentY, projMatrix,
                        totalIrradiance, totalWeight);
     }
 
         // Integrate over the image or tangent plane in the view space.
         EvaluateSample(i, n, profileID, iR, iP, pixelCoord + 0.5, cacheAnchor,
                        shapeParam, centerPosVS, mmPerUnit, pixelsPerMm,
-                       useTangentPlane, tangentX, tangentY, projMatrix,
+                       tangentX, tangentY, projMatrix,
                        totalIrradiance, totalWeight);
     }