chore: drop the CONFIGURE_NEW_SIZE debug eprintln from the configure handler

It fired on every window configure in every client, polluting stderr
logs toolkit-wide.

Co-Authored-By: Claude Fable 5 <[email protected]>

 src/backend/window_runner.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/backend/window_runner.rs b/src/backend/window_runner.rs
index 0b85da0..3a59679 100644
--- a/src/backend/window_runner.rs
+++ b/src/backend/window_runner.rs
@@ -3008,7 +3008,6 @@ impl<A: Application> WindowHandler for EngineState<A> {
         crate::scale::set_maximized(is_max);
 
         let (w, h) = configure.new_size;
-        eprintln!("CONFIGURE_NEW_SIZE: w={:?}, h={:?}, scale={}", w, h, self.scale_factor);
         if let (Some(w), Some(h)) = (w, h) {
             let width = w.get();
             let height = h.get();