Multiple previous changes made resource pools obsolete. Resource pools were used to keep track of resources when the frame is rendered. Multiple frames can be rendered at the same time and resources could overlap. This has been replaced (not this commit) to be part of the render graph and when an submission has completed the resources are recycled. Continuation of: https://projects.blender.org/blender/blender/pulls/145408 Pull Request: https://projects.blender.org/blender/blender/pulls/145511