Reproduction steps:
1. Open the attached project "ReproProj"
2. Open Package Manager (Window > Package Manager)
3. Remove High Definition RP package
4. Close Editor
5. In File Explorer, open the “ProjectSettings“ folder
6. Open the GraphicsSettings.asset in IDE
7. Observe the line with “m_RenderPipelineGlobalSettingsMap” or “m_SRPDefaultSettings“

Expected result: “m_RenderPipelineGlobalSettingsMap” is pointing to Built-In Render Pipeline or is not present
Actual result: “m_RenderPipelineGlobalSettingsMap” is pointing to “UnityEngine.Rendering.HighDefinition.HDRenderPipeline”

Reproducible with: 2022.3.61f1, 6000.0.46f1, 6000.1.0b14, 6000.2.0a8

Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested

Notes:
- Does not reproduce without closing Editor
- If the remove Button is greyed out in Package Manager, remove in Manifest.json file
- With 2022.3.61f1, look for “m_SRPDefaultSettings“ instead of “m_RenderPipelineGlobalSettingsMap“ in GraphicsSettings.asset
- The workaround is to reset Project Settings