Prune commentary and stale Rust port notes

scripts/rigs/gpu-probe/Cargo.toml

@@ -3,16 +3,11 @@ name = "gpu-probe"
 version = "0.1.0"
 edition = "2024"
 
-# Deliberately its own crate rather than a member of iris's workspace: the
-# vendored `iris/` tree is meant to stay reconcilable with the iris/iris
-# repository, and this is a rig belonging to ai-app.
+# Standalone so this app-specific rig does not alter iris's workspace.
 
 [dependencies]
-# Pinned to what iris asks for, so the answer is about iris rather than
-# about a different wgpu.
+# Match iris's wgpu version.
 wgpu = "30.0.1"
 pollster = "1.0.1"
-# Queried directly, because wgpu and `cmd gpu vkjson` disagreed about
-# descriptor indexing in the emulator and only the raw call says which is
-# right.
+# Raw Vulkan queries settle capabilities on which wgpu and `cmd gpu vkjson` disagree.
 ash = "0.38"