BlitRendererFeature in URP RenderGraph Samples contains an unused variable  scaleBias

Steps to reproduce:

1. Create a URP 3D Project
2. Open Package Manager Window
3. Switch to Samples Tab
4. Import URP RenderGraph Samples 
5. Open the BlitRendererFeature script in the URP RenderGraph Samples/BlitWithFrameData
6. Check the scaleBias variable

Actual results: scaleBias variable is declared, but not used in the Sample

Expected results: Samples do not contain unused code

Reproducible with versions: 6000.3.0b7, 6000.3.0f1, 6000.4.0a5, 6000.5.0a2

Not reproducible with versions: 6000.0.63f1, 6000.2.14f1, 6000.3.0b6

Tested on (OS): macOS 26.1, Ubuntu 24.04

Notes:

• In 6000.3.0b6 or below, scaleBias was used in the Execute Pass method which is no longer present