test: fix macos lint and keep the pixel mouse server test unix-only

src/client/input.rs

@@ -578,7 +578,7 @@ mod tests {
         let events = framer.push(b"\x1b\x1b");
 
         assert_eq!(events.len(), 1);
-        assert!(framer.has_pending_input());
+        // The second escape is still pending until the idle flush.
         assert_eq!(framer.flush_timeout().len(), 1);
     }
 

src/raw_input.rs

@@ -124,11 +124,6 @@ impl RawInputFramer {
         events_from_framed_chunks(self.byte_framer.push(data))
     }
 
-    #[cfg(all(test, unix))]
-    pub(crate) fn has_pending_input(&self) -> bool {
-        self.byte_framer.has_pending_input()
-    }
-
     #[cfg(windows)]
     pub(crate) fn holds_host_default_color_escape(&self) -> bool {
         self.byte_framer.buffer.as_slice() == [ESC]

src/server/headless/tests/mod.rs

@@ -6037,6 +6037,8 @@ async fn client_shell_release_cleanup_does_not_promote_and_survives_disconnect()
     shutdown_test_runtimes(&mut server);
 }
 
+// Pixel mouse is a Unix client capability.
+#[cfg(unix)]
 #[tokio::test]
 async fn client_shell_requests_host_pixels_for_an_unfocused_pixel_pane() {
     // #4750: host reports go to the pane under the pointer, focused or not.