chore: correct class reference case in phpstan-baseline.neon

Resolves an issue where QUI\\\\Database\\\\Exception was incorrectly referenced as
QUI\\\\DataBase\\\\Exception in phpstan-baseline.neon. It also removes the affected code for
cleaner modification.

phpstan-baseline.neon

@@ -15,11 +15,6 @@ parameters:
 			count: 1
 			path: src/QUI/ERP/Accounting/Invoice/Factory.php
 
-		-
-			message: "#^Class QUI\\\\Database\\\\Exception referenced with incorrect case\\: QUI\\\\DataBase\\\\Exception\\.$#"
-			count: 1
-			path: src/QUI/ERP/Accounting/Invoice/Invoice.php
-
 		-
 			message: "#^Method QUI\\\\ERP\\\\Accounting\\\\Invoice\\\\Invoice\\:\\:getShipping\\(\\) has invalid return type QUI\\\\ERP\\\\Shipping\\\\Types\\\\ShippingUnique\\.$#"
 			count: 2