Both are header-only, in no CMake target, #included nowhere, and their only
symbols (ScrollFadeRT, DrawScrollFadeMask) are referenced nowhere:
- src/ui/effects/scroll_fade_fbo.h — superseded by the shader-based
scroll_fade_shader.h (the implementation actually used by settings_page).
- src/ui/material/gpu_mask.h — a GPU blend-mask helper never integrated.
App + test build clean after removal; tests pass; hygiene clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>