chore: update phpstan configuration file

The commit modifies the phpstan.dist.neon configuration file. The changes include removing the
excludePaths section and adjusting the end of the file to not have a new line. This simplification
will better suit our testing environment.

phpstan.dist.neon

@@ -7,6 +7,4 @@ parameters:
         - src
         - ajax
     bootstrapFiles:
-        - tests/phpstan-bootstrap.php
-    excludePaths:
-        - src/QUI/ERP/Coupons/Events.php
+        - tests/phpstan-bootstrap.php
\ No newline at end of file