Remove new fuzzers until their GN targets work properly in Chromium.

webrtc/test/fuzzers/stun_validator_fuzzer.cc

-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "webrtc/p2p/base/stun.h"
-
-namespace webrtc {
-void FuzzOneInput(const uint8_t* data, size_t size) {
-  const char* message = reinterpret_cast<const char*>(data);
-
-  cricket::StunMessage::ValidateFingerprint(message, size);
-  cricket::StunMessage::ValidateMessageIntegrity(message, size, "");
-}
-}  // namespace webrtc