Step to repro:
- clone & checkout vfx/test/repro-project-for-regression-verify_orphan_dependencies_are_correctly_cleared running
- git clone git@github.com:Unity-Technologies/Graphics.git
- git checkout vfx/test/repro-project-for-regression-verify_orphan_dependencies_are_correctly_cleared
... Or, alternatively, download this copy: https://drive.google.com/file/d/1QiuIi3f29w8BtTDbj2csAqN2iYuph9f2/view?usp=sharing

- Open project VisualEffect_HDRP
- .\.Editor\Unity.exe -projectPath "G:\Graphics\TestProjects\VisualEffectGraph_HDRP"
- Open test runner window
- Switch to Edit Mode
- Run All

Observed the failure:
Verify_Orphan_Dependencies_Are_Correctly_Cleared (7.541s)
---
Expected: 1
But was: 2
---
at UnityEditor.VFX.Test.VFXSerializationTests.Verify_Orphan_Dependencies_Are_Correctly_Cleared () [0x001ac] in G:\Graphics\TestProjects\VisualEffectGraph_HDRP\Assets\AllTests\Editor\Tests\VFXSerializationTests.cs:489