deleted file mode 100644
--- a/dom/webauthn/WebAuthnRequest.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim:set ts=2 sw=2 sts=2 et cindent: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef mozilla_dom_WebAuthnAsync_h
-#define mozilla_dom_WebAuthnAsync_h
-
-#include "mozilla/MozPromise.h"
-#include "mozilla/ReentrantMonitor.h"
-#include "mozilla/SharedThreadPool.h"
-#include "mozilla/TimeStamp.h"
-
-namespace mozilla {
-namespace dom {
-
-//extern mozilla::LazyLogModule gWebauthLog; // defined in U2F.cpp
-
-// WebAuthnRequest tracks the completion of a single WebAuthn request that
-// may run on multiple kinds of authenticators, and be subject to a deadline.
-template<class Success>
-class WebAuthnRequest {
-public:
-  WebAuthnRequest()
-    : mCancelled(false)
-    , mSuccess(false)
-    , mCountTokens(0)
-    , mTokensFailed(0)
-    , mReentrantMonitor("WebAuthnRequest")
-  {}
-
-  void AddActiveToken(const char* aCallSite)
-  {
-    // MOZ_LOG(gWebauthLog, LogLevel::Debug,
-    //        ("WebAuthnRequest is tracking a new token, called from [%s]",
-    //         aCallSite));
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-    MOZ_ASSERT(!IsComplete());
-    mCountTokens += 1;
-  }
-
-  bool IsComplete()
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-    return mCancelled || mSuccess ||
-      (mCountTokens > 0 && mTokensFailed == mCountTokens);
-  }
-
-  void CancelNow()
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-
-    // It's possible for a race to cause CancelNow to get called after
-    // a success or a cancel. We only complete once.
-    if (IsComplete()) {
-      return;
-    }
-
-    mCancelled = true;
-    mPromise.Reject(NS_ERROR_DOM_NOT_ALLOWED_ERR, __func__);
-  }
-
-  void SetFailure(nsresult aError)
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-
-    // It's possible for a race to cause SetFailure to get called after
-    // a success or a cancel. We only complete once.
-    if (IsComplete()) {
-      return;
-    }
-
-    mTokensFailed += 1;
-    MOZ_ASSERT(mTokensFailed <= mCountTokens);
-
-    if (mTokensFailed == mCountTokens) {
-      // Provide the final error as being indicitive of the whole set.
-      mPromise.Reject(aError, __func__);
-    }
-  }
-
-  void SetSuccess(const Success& aResult)
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-
-    // It's possible for a race to cause multiple calls to SetSuccess
-    // in succession. We will only select the earliest.
-    if (IsComplete()) {
-      return;
-    }
-
-    mSuccess = true;
-    mPromise.Resolve(aResult, __func__);
-  }
-
-  void SetDeadline(TimeDuration aDeadline)
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-    MOZ_ASSERT(!IsComplete());
-    // TODO: Monitor the deadline and stop with a timeout error if it expires.
-  }
-
-  RefPtr<MozPromise<Success, nsresult, false>> Ensure()
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-    MOZ_ASSERT(!IsComplete());
-    return mPromise.Ensure(__func__);
-  }
-
-  void CompleteTask()
-  {
-    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
-
-    if (mCountTokens == 0) {
-      // Special case for there being no tasks to complete
-      mPromise.Reject(NS_ERROR_DOM_NOT_ALLOWED_ERR, __func__);
-    }
-  }
-
-  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebAuthnRequest)
-
-private:
-  ~WebAuthnRequest() {};
-
-  bool mCancelled;
-  bool mSuccess;
-  int mCountTokens;
-  int mTokensFailed;
-  ReentrantMonitor mReentrantMonitor;
-  MozPromiseHolder<MozPromise<Success, nsresult, false>> mPromise;
-};
-
-} // namespace dom
-} // namespace mozilla
-
-#endif // mozilla_dom_WebAuthnAsync_h

--- a/dom/webauthn/moz.build
+++ b/dom/webauthn/moz.build
@@ -17,17 +17,16 @@ EXPORTS.mozilla.dom += [
     'AuthenticatorResponse.h',
     'PublicKeyCredential.h',
     'U2FHIDTokenManager.h',
     'U2FSoftTokenManager.h',
     'U2FTokenManager.h',
     'U2FTokenTransport.h',
     'WebAuthnCBORUtil.h',
     'WebAuthnManager.h',
-    'WebAuthnRequest.h',
     'WebAuthnTransactionChild.h',
     'WebAuthnTransactionParent.h',
     'WebAuthnUtil.h',
 ]
 
 UNIFIED_SOURCES += [
     'AuthenticatorAssertionResponse.cpp',
     'AuthenticatorAttestationResponse.cpp',