Remove "expect" from fallible code

    code would crash if handling pointer capture outside of winit on
    every mouse click

    we swallow the error since we could not think of a case where this
    would fail in a way that would want to handle that it fails

src/platform_impl/web/web_sys/canvas/pointer_handler.rs

@@ -79,9 +79,11 @@ impl PointerHandler {
                     event::mouse_button(&event),
                     event::mouse_modifiers(&event),
                 );
-                canvas
-                    .set_pointer_capture(event.pointer_id())
-                    .expect("Failed to set pointer capture");
+
+                // Error is swallowed here since the error would occur every time the mouse is
+                // clicked when the cursor is grabbed, and there is probably not a situation where
+                // this could fail, that we care if it fails.
+                let _e = canvas.set_pointer_capture(event.pointer_id());
             },
         ));
     }