Take a reference to a window in GraphicsContext::new, like glutin and wgpu

src/error.rs

@@ -1,14 +1,13 @@
 use std::error::Error;
-use raw_window_handle::{HasRawWindowHandle, RawDisplayHandle, RawWindowHandle};
+use raw_window_handle::{RawDisplayHandle, RawWindowHandle};
 use thiserror::Error;
 
 #[derive(Error, Debug)]
-pub enum SwBufError<W: HasRawWindowHandle> {
+pub enum SwBufError {
     #[error(
         "The provided window returned an unsupported platform: {human_readable_window_platform_name}, {human_readable_display_platform_name}."
     )]
     UnsupportedPlatform {
-        window: W,
         human_readable_window_platform_name: &'static str,
         human_readable_display_platform_name: &'static str,
         window_handle: RawWindowHandle,
@@ -19,9 +18,9 @@ pub enum SwBufError<W: HasRawWindowHandle> {
 }
 
 #[allow(unused)] // This isn't used on all platforms
-pub(crate) fn unwrap<T, E: std::error::Error + 'static, W: HasRawWindowHandle>(res: Result<T, E>, str: &str) -> Result<T, SwBufError<W>>{
+pub(crate) fn unwrap<T, E: std::error::Error + 'static>(res: Result<T, E>, str: &str) -> Result<T, SwBufError>{
     match res{
         Ok(t) => Ok(t),
         Err(e) => Err(SwBufError::PlatformError(Some(str.into()), Some(Box::new(e))))
     }
-}
+}