some cleanups

Author: arghyasur1991

package/Runtime/GaussianSplatURPFeature.cs

@@ -110,7 +110,7 @@ public override void RecordRenderGraph(RenderGraph renderGraph, ContextContainer
                     }
                     else
                     {
-                        // Legacy single-eye rendering for backward compatibility
+                        // Single-eye rendering
                         commandBuffer.SetGlobalTexture(s_gaussianSplatRT, data.GaussianSplatRT);
                         CoreUtils.SetRenderTarget(commandBuffer, data.GaussianSplatRT, data.SourceDepth, ClearFlag.Color, Color.clear);
                         Material matComposite = GaussianSplatRenderSystem.instance.SortAndRenderSplats(data.CameraData.camera, commandBuffer);

package/Shaders/GaussianComposite.shader

@@ -16,8 +16,6 @@ CGPROGRAM
 #pragma require compute
 #pragma use_dxc
 #pragma require 2darray
-#pragma multi_compile_instancing
-#pragma require instancing
 
 // Enable proper multi-compile support for all stereo rendering modes
 #pragma multi_compile_local _ UNITY_SINGLE_PASS_STEREO STEREO_INSTANCING_ON STEREO_MULTIVIEW_ON
@@ -60,7 +58,6 @@ int _CustomStereoEyeIndex;
 half4 frag (v2f i) : SV_Target
 {
     uint eyeIndex = _CustomStereoEyeIndex;
-    // return float4(eyeIndex == 0 ? 1 : 0, 0, eyeIndex == 1 ? 1 : 0, 1); // Red = left, Blue = right
 
     // Normalize the pixel coordinates to [0,1] range
     float2 normalizedUV = float2(i.vertex.x / _ScreenParams.x, i.vertex.y / _ScreenParams.y);