Remove a debugging statement

Author: alexcrichton

crates/futures/src/wait_async_polyfill.rs

@@ -48,7 +48,6 @@ onmessage = function (ev) {
     let [ia, index, value] = ev.data;
     ia = new Int32Array(ia.buffer);
     let result = Atomics.wait(ia, index, value);
-    console.log('done', result);
     postMessage(result);
 };
 ";