Revert "Disable multiuser toggle on COPE device and add explanat..."

Revert submission 25262217-fix_mu_for_cope

Reason for revert: This issue requires a different approach to the solution.

Reverted changes: /q/submissionid:25262217-fix_mu_for_cope

Change-Id: Ic16676a15278b944ab2a3a6535032c37e5ece624
diff --git a/packages/SettingsLib/src/com/android/settingslib/RestrictedLockUtilsInternal.java b/packages/SettingsLib/src/com/android/settingslib/RestrictedLockUtilsInternal.java
index e77964c..03d1cda 100644
--- a/packages/SettingsLib/src/com/android/settingslib/RestrictedLockUtilsInternal.java
+++ b/packages/SettingsLib/src/com/android/settingslib/RestrictedLockUtilsInternal.java
@@ -243,32 +243,6 @@
     }
 
     /**
-     * Checks whether add user is disabled on the device
-     *
-     * @param context {@link Context} for the calling user.
-     *
-     *
-     * @param userId User to check enforced admin status for.
-     *
-     * @return EnforcedAdmin Object containing the enforced admin component and admin user details,
-     * or {@code null} If adding user is not disabled.
-     */
-    public static EnforcedAdmin checkIfAddUserDisallowed(Context context, int userId) {
-        final UserManager um = UserManager.get(context);
-        if (!um.hasUserRestriction(UserManager.DISALLOW_ADD_USER, UserHandle.of(userId))) {
-            // Restriction is not enforced.
-            return null;
-        }
-        EnforcedAdmin enforcedAdmin = checkIfRestrictionEnforced(context,
-                UserManager.DISALLOW_ADD_USER, userId);
-        if (enforcedAdmin != null) {
-            return enforcedAdmin;
-        }
-        return EnforcedAdmin.createDefaultEnforcedAdminWithRestriction(
-                UserManager.DISALLOW_ADD_USER);
-    }
-
-    /**
      * Check if an application is suspended.
      *
      * @return EnforcedAdmin Object containing the enforced admin component and admin user details,