Revert "Fix #14433 - "You do not have privileges to manipulate with t…

…he users!" on root superadmin"

This reverts commit b865011.

Signed-off-by: Maurício Meneghini Fauth <mauricio@fauth.dev>

libraries/classes/DatabaseInterface.php

@@ -2330,11 +2330,7 @@ public function getCurrentUserAndHost()
     {
         if (count($this->_current_user) == 0) {
             $user = $this->getCurrentUser();
-            if ($user === '@') {// Request did not succeed, please do not cache
-                return ['', ''];
-            } else {
-                $this->_current_user = explode("@", $user);
-            }
+            $this->_current_user = explode("@", $user);
         }
         return $this->_current_user;
     }