Revert "Remote powerwash on Chromad via policy"

This reverts commit 6ff1599.

Reason for revert: Seems to have caused browser_test failures on linux-chromeos-chrome 

https://ci.chromium.org/p/chrome/builders/ci/linux-chromeos-chrome/19698
rowserTestBase received signal: Segmentation fault. Backtrace:
#0 0x563ae696f899 base::debug::CollectStackTrace()
#1 0x563ae68d6683 base::debug::StackTrace::StackTrace()
#2 0x563ae6ff8293 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#3 0x7f9ac9026040 (/lib/x86_64-linux-gnu/libc-2.27.so+0x3f03f)
#4 0x563ae7720266 PrefChangeRegistrar::RemoveAll()
#5 0x563ae7720222 PrefChangeRegistrar::~PrefChangeRegistrar()
#6 0x563ae2f37095 std::__1::unique_ptr<>::reset()
#7 0x563ae3696a1b policy::ActiveDirectoryMigrationManager::~ActiveDirectoryMigrationManager()
#8 0x563ae3696a38 policy::ActiveDirectoryMigrationManager::~ActiveDirectoryMigrationManager()
#9 0x563ae369a699 policy::BrowserPolicyConnectorAsh::~BrowserPolicyConnectorAsh()
#10 0x563ae369a6fe policy::BrowserPolicyConnectorAsh::~BrowserPolicyConnectorAsh()
#11 0x563ae6a0edbd BrowserProcessImpl::~BrowserProcessImpl()
#12 0x563ae6a0edea BrowserProcessImpl::~BrowserProcessImpl()
#13 0x563ae6a668e9 browser_shutdown::ShutdownPostThreadsStop()
#14 0x563ae6a0e226 ChromeBrowserMainParts::PostDestroyThreads()
#15 0x563ae349ef9b ash::ChromeBrowserMainPartsAsh::PostDestroyThreads()
#16 0x563ae495d2d9 content::BrowserMainLoop::ShutdownThreadsAndCleanUp()
#17 0x563ae495e53c content::BrowserMainRunnerImpl::Shutdown()
#18 0x563ae495a9ce content::BrowserMain()
#19 0x563ae555e819 content::RunBrowserProcessMain()
#20 0x563ae555f8e0 content::ContentMainRunnerImpl::RunBrowser()
#21 0x563ae555f431 content::ContentMainRunnerImpl::Run()
#22 0x563ae555d209 content::RunContentProcess()
#23 0x563ae555d861 content::ContentMain()
#24 0x563ae6ff6f2b content::BrowserTestBase::SetUp()
#25 0x563ae68bf947 InProcessBrowserTest::SetUp()
#26 0x563ae3b0fbed testing::Test::Run()
#27 0x563ae3b10520 testing::TestInfo::Run()
#28 0x563ae3b10ce1 testing::TestSuite::Run()
#29 0x563ae3b1a61a testing::internal::UnitTestImpl::RunAllTests()
#30 0x563ae3b1a219 testing::UnitTest::Run()
#31 0x563ae69d5af8 base::TestSuite::Run()
#32 0x563ae688bfa1 BrowserTestSuiteRunnerChromeOS::RunTestSuite()
#33 0x563ae70407b7 content::LaunchTests()
#34 0x563ae688e77a LaunchChromeTests()
#35 0x563ae688bf23 main
#36 0x7f9ac9008bf7 __libc_start_main
#37 0x563ae134462a _start

Original change's description:
> Remote powerwash on Chromad via policy
>
> Implement remote powerwash on Chromad, using the recently added
> ChromadToCloudMigrationEnabled policy. The powerwash will be used to
> start the migration of AD managed devices into cloud management. Besides
> having the new policy enabled, the device needs to be on the login
> screen and the enrollment ID must have already been uploaded to
> DMServer.
>
> Bug: 1209246
> Change-Id: I6a67b8a8a43c28bc5f03f27e96d0415f69b6bc83
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3141873
> Reviewed-by: Maksim Ivanov <[email protected]>
> Reviewed-by: Roman Sorokin <[email protected]>
> Reviewed-by: Colin Blundell <[email protected]>
> Commit-Queue: Felipe Andrade <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#959123}

Bug: 1209246
Change-Id: If067abcf2a9289ebacaeb240b1f67749c305509c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3389555
Auto-Submit: Scott Violet <[email protected]>
Commit-Queue: Rubber Stamper <[email protected]>
Bot-Commit: Rubber Stamper <[email protected]>
Cr-Commit-Position: refs/heads/main@{#959243}

chrome/browser/ash/kerberos/kerberos_credentials_manager.h

@@ -135,7 +135,7 @@ class KerberosCredentialsManager : public KeyedService,
   void ListAccounts(ListAccountsCallback callback);
 
   // Sets the contents of the Kerberos configuration (krb5.conf) to |krb5_conf|
-  // for the account with given |principal_name|.
+  // for the account  with given |principal_name|.
   void SetConfig(std::string principal_name,
                  const std::string& krb5_conf,
                  ResultCallback callback);