remove useless alert

src/lib.rs

@@ -9,11 +9,6 @@ use wasm_bindgen::JsCast;
 #[global_allocator]
 static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 
-#[wasm_bindgen]
-extern "C" {
-    fn alert(s: &str);
-}
-
 fn le_document() -> web_sys::Document {
     let window = web_sys::window().expect("pas de window");
     window.document().expect("pas_de_document")