Claude review: drm/doc: Remove obsolete RFC docs related to i915.

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Overall Series Review

Subject: drm/doc: Remove obsolete RFC docs related to i915.
Author: Maarten Lankhorst <dev@lankhorst.se>
Patches: 6
Reviewed: 2026-04-23T10:10:53.144524

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This is a straightforward documentation cleanup series that removes four obsolete RFC documents from `Documentation/gpu/rfc/`. The justification is sound: these RFCs describe i915 features that have either been implemented and shipped (lmem, small_bar, GuC scheduler) or superseded by the xe driver (vm_bind). The RFC section is explicitly meant to be temporary — `index.rst` itself says "Once the code has landed move all the documentation to the right places in the main core, helper or driver sections."

The series is low risk (documentation-only, no code changes) and logically structured with one patch per RFC removal. Each commit message provides adequate justification referencing either specific landed commits or the xe driver as the successor implementation.

**Minor nit on the series**: After all four patches are applied, the final `index.rst` has two remaining `.. toctree::` directives (for `gpusvm.rst` and `color_pipeline.rst`) that could be consolidated into one, but that's a pre-existing style issue and not in scope here.

No objections to this series.

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