Signin cleanup: Remove unused Autologin prefs

The prefs kAutologinEnabled and kReverseAutologinRejectedEmailList were
unused.

Bug: none
Change-Id: I802726a0cc507b7a862b02e6bef595237225b177
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5571340
Commit-Queue: Marc Treib <[email protected]>
Code-Coverage: [email protected] <[email protected]>
Reviewed-by: David Roger <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1306361}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 9584a18..3241493 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -1098,6 +1098,11 @@
 inline constexpr char kSyncCachedTrustedVaultAutoUpgradeDebugInfo[] =
     "sync.cached_trusted_vault_auto_upgrade_debug_info";
 
+// Deprecated 05/2024.
+inline constexpr char kAutologinEnabled[] = "autologin.enabled";
+inline constexpr char kReverseAutologinRejectedEmailList[] =
+    "reverse_autologin.rejected_email_list";
+
 // Register local state used only for migration (clearing or moving to a new
 // key).
 void RegisterLocalStatePrefsForMigration(PrefRegistrySimple* registry) {
@@ -1582,6 +1587,10 @@
 
   // Deprecated 05/2024.
   registry->RegisterStringPref(kSyncCachedTrustedVaultAutoUpgradeDebugInfo, "");
+
+  // Deprecated 05/2024.
+  registry->RegisterBooleanPref(kAutologinEnabled, true);
+  registry->RegisterListPref(kReverseAutologinRejectedEmailList);
 }
 
 void ClearSyncRequestedPrefAndMaybeMigrate(PrefService* profile_prefs) {
@@ -2951,6 +2960,10 @@
   // Added 05/2024.
   profile_prefs->ClearPref(kSyncCachedTrustedVaultAutoUpgradeDebugInfo);
 
+  // Added 05/2024.
+  profile_prefs->ClearPref(kAutologinEnabled);
+  profile_prefs->ClearPref(kReverseAutologinRejectedEmailList);
+
   // Please don't delete the following line. It is used by PRESUBMIT.py.
   // END_MIGRATE_OBSOLETE_PROFILE_PREFS