Revert of [Windows Sandbox] Turn on MITIGATION_EXTENSION_POINT_DISABLE.

chrome/browser/win/chrome_elf_init.cc

Index: chrome/browser/win/chrome_elf_init.cc
diff --git a/chrome/browser/win/chrome_elf_init.cc b/chrome/browser/win/chrome_elf_init.cc
index d954dbe45454e49c1eb427ed904e44cb31a0cbb9..5c091296c46aa393c7ca68a47c3c5139a3b0b775 100644
--- a/chrome/browser/win/chrome_elf_init.cc
+++ b/chrome/browser/win/chrome_elf_init.cc
@@ -18,7 +18,6 @@
 #include "chrome_elf/dll_hash/dll_hash.h"
 #include "components/variations/variations_associated_data.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/common/content_features.h"
 
 const char kBrowserBlacklistTrialName[] = "BrowserBlacklist";
 const char kBrowserBlacklistTrialDisabledGroupName[] = "NoBlacklist";
@@ -110,22 +109,6 @@
       FROM_HERE,
       base::Bind(&ReportSuccessfulBlocks),
       base::TimeDelta::FromSeconds(kBlacklistReportingDelaySec));
-
-  // Make sure the early finch emergency "off switch" for
-  // sandbox::MITIGATION_EXTENSION_POINT_DISABLE is set properly in reg.
-  // Note: the very existence of this key signals elf to not enable
-  // this mitigation on browser next start.
-  base::win::RegKey finch_security_registry_key(
-      HKEY_CURRENT_USER, elf_sec::kRegSecurityFinchPath, KEY_READ);
-
-  if (base::FeatureList::IsEnabled(features::kWinSboxDisableExtensionPoints)) {
-    if (finch_security_registry_key.Valid())
-      finch_security_registry_key.DeleteKey(L"");
-  } else {
-    if (!finch_security_registry_key.Valid())
-      finch_security_registry_key.Create(
-          HKEY_CURRENT_USER, elf_sec::kRegSecurityFinchPath, KEY_WRITE);
-  }
 }
 
 void BrowserBlacklistBeaconSetup() {