Revert "compositor: Create a single cross-process compositor API (#33619)" (#33645)

This reverts commit f2f5614ad6.

This is causing intermittent crashes: https://github.com/servo/servo/actions/runs/11167043809/job/31044255019

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

ports/servoshell/desktop/headed_window.rs

@@ -536,10 +536,10 @@ impl WindowMethods for Window {
         EmbedderCoordinates {
             viewport,
             framebuffer: viewport.size(),
-            window_rect: DeviceIntRect::from_origin_and_size(window_origin, window_size),
-            screen_size: screen,
+            window: (window_size, window_origin),
+            screen,
             // FIXME: Winit doesn't have API for available size. Fallback to screen size
-            available_screen_size: screen,
+            screen_avail: screen,
             hidpi_factor: self.hidpi_factor(),
         }
     }