diff --git a/ci/licenses_golden/licenses_flutter b/ci/licenses_golden/licenses_flutter
index cb29952e3d5a4..844001143395e 100644
--- a/ci/licenses_golden/licenses_flutter
+++ b/ci/licenses_golden/licenses_flutter
@@ -1168,9 +1168,6 @@ FILE: ../../../flutter/third_party/tonic/logging/dart_invoke.cc
 FILE: ../../../flutter/third_party/tonic/logging/dart_invoke.h
 FILE: ../../../flutter/third_party/tonic/parsers/packages_map.cc
 FILE: ../../../flutter/third_party/tonic/parsers/packages_map.h
-FILE: ../../../flutter/third_party/tonic/platform/platform_utils.h
-FILE: ../../../flutter/third_party/tonic/platform/platform_utils_posix.cc
-FILE: ../../../flutter/third_party/tonic/platform/platform_utils_win.cc
 FILE: ../../../flutter/third_party/tonic/scopes/dart_api_scope.h
 FILE: ../../../flutter/third_party/tonic/scopes/dart_isolate_scope.cc
 FILE: ../../../flutter/third_party/tonic/scopes/dart_isolate_scope.h
diff --git a/third_party/tonic/BUILD.gn b/third_party/tonic/BUILD.gn
index b51517a63948f..4114ac4da6214 100644
--- a/third_party/tonic/BUILD.gn
+++ b/third_party/tonic/BUILD.gn
@@ -39,7 +39,6 @@ source_set("tonic") {
     "converter",
     "file_loader",
     "logging",
-    "platform",
     "scopes",
     "typed_data",
     "//third_party/dart/runtime:dart_api",
diff --git a/third_party/tonic/file_loader/BUILD.gn b/third_party/tonic/file_loader/BUILD.gn
index 2812a5bf4d982..e350a447c438f 100644
--- a/third_party/tonic/file_loader/BUILD.gn
+++ b/third_party/tonic/file_loader/BUILD.gn
@@ -25,7 +25,6 @@ source_set("file_loader") {
     "../converter",
     "../filesystem",
     "../parsers",
-    "../platform",
     "//third_party/dart/runtime:dart_api",
   ]
 }
diff --git a/third_party/tonic/file_loader/file_loader.cc b/third_party/tonic/file_loader/file_loader.cc
index 1cbff502074fe..88cc9343c76fa 100644
--- a/third_party/tonic/file_loader/file_loader.cc
+++ b/third_party/tonic/file_loader/file_loader.cc
@@ -14,7 +14,6 @@
 #include "tonic/common/macros.h"
 #include "tonic/converter/dart_converter.h"
 #include "tonic/parsers/packages_map.h"
-#include "tonic/platform/platform_utils.h"
 
 namespace tonic {
 namespace {
diff --git a/third_party/tonic/platform/BUILD.gn b/third_party/tonic/platform/BUILD.gn
deleted file mode 100644
index 48c9f60604f43..0000000000000
--- a/third_party/tonic/platform/BUILD.gn
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright 2013 The Flutter Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-source_set("platform") {
-  visibility = [ "../*" ]
-
-  configs += [ "../:config" ]
-
-  if (is_win) {
-    set_sources_assignment_filter([ "*_posix.cc" ])
-  } else {
-    set_sources_assignment_filter([ "*_win.cc" ])
-  }
-
-  deps = [
-    "../common",
-  ]
-
-  sources = [
-    "platform_utils.h",
-    "platform_utils_posix.cc",
-    "platform_utils_win.cc",
-  ]
-}
diff --git a/third_party/tonic/platform/platform_utils.h b/third_party/tonic/platform/platform_utils.h
deleted file mode 100644
index 637d4f31b7318..0000000000000
--- a/third_party/tonic/platform/platform_utils.h
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2013 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef LIB_TONIC_PLATFORM_UTILS_H_
-#define LIB_TONIC_PLATFORM_UTILS_H_
-
-namespace tonic {
-
-// Calls the equivalent of exit(status) for a given platform.
-void PlatformExit(int status);
-
-}  // namespace tonic
-
-#endif  // LIB_TONIC_PLATFORM_UTILS_H_
diff --git a/third_party/tonic/platform/platform_utils_posix.cc b/third_party/tonic/platform/platform_utils_posix.cc
deleted file mode 100644
index 630eafad70df4..0000000000000
--- a/third_party/tonic/platform/platform_utils_posix.cc
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2013 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <cstdlib>
-#include "platform_utils.h"
-
-namespace tonic {
-
-void PlatformExit(int status) {
-  exit(status);
-}
-
-}  // namespace tonic
diff --git a/third_party/tonic/platform/platform_utils_win.cc b/third_party/tonic/platform/platform_utils_win.cc
deleted file mode 100644
index 49b3b3a9b4af1..0000000000000
--- a/third_party/tonic/platform/platform_utils_win.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2013 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "platform_utils.h"
-
-#include <windows.h>
-
-namespace tonic {
-
-void PlatformExit(int status) {
-  ::ExitProcess(status);
-}
-
-}  // namespace tonic