refactor: remove unnecessary comments in user conversion

Removed some superfluous comments and exception declaration in the convertUserToErpUser function within the User.php class. These comments were not adding any useful information, and the exception mentioned was not being thrown, hence their removal.

src/QUI/ERP/Accounting/CalculationValue.php

@@ -71,10 +71,10 @@ public function value(): float | int
     /**
      * Return the CalculationValue with the wanted precision
      *
-     * @param bool $precision
+     * @param bool|int $precision
      * @return CalculationValue
      */
-    public function precision(bool $precision = false): CalculationValue
+    public function precision(bool | int $precision = false): CalculationValue
     {
         if ($precision === false) {
             return $this;