Remove the SyzyASan allocation filter file from the instrument.exe command line.

chrome/tools/build/win/syzygy/syzyasan-allocation-filter.txt

-# Copyright (c) 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-#
-# This file describes suspicious allocation sites that are to be treated
-# specially and served from the page heap. It is used at instrumentation time
-# to ensure allocations are runtime redirected from specified stack traces.
-#
-# See chrome_syzygy.gypi and instrument.py for more details.
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// This file describes suspicious allocation sites that are to be treated
+// specially and served from the page heap. It is used at instrumentation time
+// to ensure allocations are runtime redirected from specified stack traces.
+//
+// See chrome_syzygy.gypi and instrument.py for more details.
+{
+  "hooks": {
+    "func": []
+  }
+}