Prune commentary and stale Rust port notes

scripts/rigs/gpu-probe/src/vk.rs

@@ -1,11 +1,3 @@
-//! The raw Vulkan half of the probe.
-//!
-//! wgpu reports a feature only after a chain of its own decisions -- which
-//! physical device, which API version, which extension list -- so "wgpu says
-//! no" and "the driver says no" are different claims. This asks
-//! `vkGetPhysicalDeviceFeatures2` itself and prints the inputs to that chain,
-//! so a disagreement can be attributed rather than guessed at.
-
 use ash::{Entry, vk};
 use std::ffi::CStr;
 
@@ -29,9 +21,6 @@ pub fn report() {
     println!("\nraw vulkan:");
     println!("  loader instance version: {}", ver(instance_version));
 
-    // Ask for the highest instance version the loader admits to: wgpu clamps
-    // the device version by the instance's, so an instance created at 1.0
-    // makes a 1.3 device look like 1.0.
     let app_info = vk::ApplicationInfo::default().api_version(instance_version);
     let create = vk::InstanceCreateInfo::default().application_info(&app_info);
     let instance = match unsafe { entry.create_instance(&create, None) } {