1 files changed, 0 insertions, 72 deletions

diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index 47c2ab9b1..c13faa936 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -11,10 +11,6 @@ delete Intl.v8BreakIterator;
 ((window) => {
   const core = Deno.core;
   const {
-    ArrayPrototypeIndexOf,
-    ArrayPrototypePush,
-    ArrayPrototypeShift,
-    ArrayPrototypeSplice,
     ArrayPrototypeMap,
     DateNow,
     Error,
@@ -31,11 +27,7 @@ delete Intl.v8BreakIterator;
     SymbolFor,
     SymbolIterator,
     PromisePrototypeThen,
-    SafeWeakMap,
     TypeError,
-    WeakMapPrototypeDelete,
-    WeakMapPrototypeGet,
-    WeakMapPrototypeSet,
   } = window.__bootstrap.primordials;
   const util = window.__bootstrap.util;
   const eventTarget = window.__bootstrap.eventTarget;
@@ -241,7 +233,6 @@ delete Intl.v8BreakIterator;
 
   function runtimeStart(runtimeOptions, source) {
     core.setMacrotaskCallback(timers.handleTimerMacrotask);
-    core.setMacrotaskCallback(promiseRejectMacrotaskCallback);
     core.setWasmStreamingCallback(fetch.handleWasmStreaming);
     core.opSync("op_set_format_exception_callback", formatException);
     version.setVersions(
@@ -420,7 +411,6 @@ delete Intl.v8BreakIterator;
     PerformanceEntry: util.nonEnumerable(performance.PerformanceEntry),
     PerformanceMark: util.nonEnumerable(performance.PerformanceMark),
     PerformanceMeasure: util.nonEnumerable(performance.PerformanceMeasure),
-    PromiseRejectionEvent: util.nonEnumerable(PromiseRejectionEvent),
     ProgressEvent: util.nonEnumerable(ProgressEvent),
     ReadableStream: util.nonEnumerable(streams.ReadableStream),
     ReadableStreamDefaultReader: util.nonEnumerable(
@@ -563,60 +553,6 @@ delete Intl.v8BreakIterator;
     postMessage: util.writable(postMessage),
   };
 
-  const pendingRejections = [];
-  const pendingRejectionsReasons = new SafeWeakMap();
-
-  function promiseRejectCallback(type, promise, reason) {
-    switch (type) {
-      case 0: {
-        core.opSync("op_store_pending_promise_exception", promise, reason);
-        ArrayPrototypePush(pendingRejections, promise);
-        WeakMapPrototypeSet(pendingRejectionsReasons, promise, reason);
-        break;
-      }
-      case 1: {
-        core.opSync("op_remove_pending_promise_exception", promise);
-        const index = ArrayPrototypeIndexOf(pendingRejections, promise);
-        if (index > -1) {
-          ArrayPrototypeSplice(pendingRejections, index, 1);
-          WeakMapPrototypeDelete(pendingRejectionsReasons, promise);
-        }
-        break;
-      }
-      default:
-        return;
-    }
-  }
-
-  function promiseRejectMacrotaskCallback() {
-    while (pendingRejections.length > 0) {
-      const promise = ArrayPrototypeShift(pendingRejections);
-      const hasPendingException = core.opSync(
-        "op_has_pending_promise_exception",
-        promise,
-      );
-      const reason = WeakMapPrototypeGet(pendingRejectionsReasons, promise);
-      WeakMapPrototypeDelete(pendingRejectionsReasons, promise);
-
-      if (!hasPendingException) {
-        return;
-      }
-
-      const event = new PromiseRejectionEvent("unhandledrejection", {
-        cancelable: true,
-        promise,
-        reason,
-      });
-      globalThis.dispatchEvent(event);
-
-      // If event was not prevented we will let Rust side handle it.
-      if (event.defaultPrevented) {
-        core.opSync("op_remove_pending_promise_exception", promise);
-      }
-    }
-    return true;
-  }
-
   let hasBootstrapped = false;
 
   function bootstrapMainRuntime(runtimeOptions) {
@@ -649,10 +585,6 @@ delete Intl.v8BreakIterator;
     defineEventHandler(window, "load");
     defineEventHandler(window, "beforeunload");
     defineEventHandler(window, "unload");
-    defineEventHandler(window, "unhandledrejection");
-
-    core.setPromiseRejectCallback(promiseRejectCallback);
-
     const isUnloadDispatched = SymbolFor("isUnloadDispatched");
     // Stores the flag for checking whether unload is dispatched or not.
     // This prevents the recursive dispatches of unload events.
@@ -753,10 +685,6 @@ delete Intl.v8BreakIterator;
 
     defineEventHandler(self, "message");
     defineEventHandler(self, "error", undefined, true);
-    defineEventHandler(self, "unhandledrejection");
-
-    core.setPromiseRejectCallback(promiseRejectCallback);
-
     // `Deno.exit()` is an alias to `self.close()`. Setting and exit
     // code using an op in worker context is a no-op.
     os.setExitHandler((_exitCode) => {