Remove chrome-installer-util-util_constants.cc.patch

This patch can be removed in favour of chromium_src overrides to
redefine the values for the constants we're interested in.

Resolves brave/brave-browser#14340

chromium_src/chrome/installer/util/util_constants.cc

@@ -0,0 +1,31 @@
+/* Copyright (c) 2021 The Brave Authors. All rights reserved.
+ * 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/. */
+
+#include "chrome/installer/util/util_constants.h"
+
+#define kGoogleUpdateIsMachineEnvVar kGoogleUpdateIsMachineEnvVar_ChromiumImpl
+#define kChromeExe kChromeExe_Unused
+
+#include "../../../../../chrome/installer/util/util_constants.cc"
+
+#undef kGoogleUpdateIsMachineEnvVar
+#undef kChromeExe
+
+namespace installer {
+
+namespace env_vars {
+
+#if defined(OFFICIAL_BUILD)
+const char kGoogleUpdateIsMachineEnvVar[] = "BraveSoftwareUpdateIsMachine";
+#else
+const char kGoogleUpdateIsMachineEnvVar[] =
+    kGoogleUpdateIsMachineEnvVar_ChromiumImpl;
+#endif
+
+}  // namespace env_vars
+
+const wchar_t kChromeExe[] = L"brave.exe";
+
+}  // namespace installer