fix clippy warnings

Author: Marc Pabst

wgpu-hal/src/dx12/mod.rs

@@ -537,15 +537,6 @@ struct SwapChain {
     present_mode: wgt::PresentMode,
     format: wgt::TextureFormat,
     size: wgt::Extent3d,
-    options: wgt::Dx12BackendOptions,
-}
-
-impl SwapChain {
-    /// Returns the waitable handle associated with this swap chain, if any.
-    /// Handle is only valid while the swap chain is alive.
-    pub unsafe fn waitable_handle(&self) -> Option<Foundation::HANDLE> {
-        self.waitable
-    }
 }
 
 enum SurfaceTarget {
@@ -574,13 +565,10 @@ impl Surface {
         Some(self.swap_chain.read().as_ref()?.raw.clone())
     }
 
-    /// Returns the waitable handle of the swapchain, if it exists.
+    /// Returns the waitable handle associated with this swap chain, if any.
+    /// Handle is only valid while the swap chain is alive.
     pub unsafe fn waitable_handle(&self) -> Option<Foundation::HANDLE> {
-        let swapchain = self.swap_chain.read();
-        if let Some(swap_chain) = swapchain.as_ref() {
-            return swap_chain.waitable.clone();
-        }
-        None
+        self.swap_chain.read().as_ref()?.waitable
     }
 }
 
@@ -1424,7 +1412,6 @@ impl crate::Surface for Surface {
             present_mode: config.present_mode,
             format: config.format,
             size: config.extent,
-            options: device.options.clone(),
         });
 
         Ok(())