fix: mobile clippy warnings

plugins/single-instance/examples/vanilla/src-tauri/src/main.rs

@@ -8,15 +8,20 @@
 )]
 
 fn main() {
-    tauri::Builder::default()
-        .plugin(
-            tauri_plugin_single_instance::Builder::new()
-                .callback(move |app, argv, cwd| {
-                    println!("{}, {argv:?}, {cwd}", app.package_info().name);
-                })
-                .dbus_id("org.Tauri.SIExampleApp".to_owned())
-                .build(),
-        )
+    let builder = tauri::Builder::default();
+
+    // single-instance is only available on desktop
+    #[cfg(desktop)]
+    let builder = builder.plugin(
+        tauri_plugin_single_instance::Builder::new()
+            .callback(move |app, argv, cwd| {
+                println!("{}, {argv:?}, {cwd}", app.package_info().name);
+            })
+            .dbus_id("org.Tauri.SIExampleApp".to_owned())
+            .build(),
+    );
+
+    builder
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }