x11: Do not check hover state on properties change (#15518)

This fixes an issue where the window's hovered state would be incorrect,
causing the cursor not to update because it would think the window
wasn't hovered ([relevant
check](a03beeeb5b/crates/gpui/src/window.rs (L3016-L3017))).

The code here doesn't really seem to make sense, since there's already
the `XinputEnter` and `XinputLeave` events that indicate mouse focus
state on the window. The properties change event wouldn't necessarily
indicate when mouse focus changes.

Thanks @Emc2356 for reporting this on the Discord and helping figure out
the issue!
 
Release Notes:

- Linux: Fixed the cursor sometimes not changing on X11

crates/gpui/src/platform/linux/x11/window.rs

@@ -791,15 +791,6 @@ impl X11WindowStatePtr {
                 state.hidden = true;
             }
         }
-
-        let hovered_window = self
-            .xcb_connection
-            .query_pointer(state.x_root_window)
-            .unwrap()
-            .reply()
-            .unwrap()
-            .child;
-        self.set_hovered(hovered_window == self.x_window);
     }
 
     pub fn close(&self) {