fix: remove getBindingType method from Ltree Doctrine type

The method was returning a default value, and its signature changed from Doctrine 2 to Doctrine 3.

Author: landure

src/MartinGeorgiev/Doctrine/DBAL/Types/Ltree.php

@@ -4,7 +4,6 @@
 
 namespace MartinGeorgiev\Doctrine\DBAL\Types;
 
-use Doctrine\DBAL\ParameterType;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
 use MartinGeorgiev\Doctrine\DBAL\Types\Exceptions\InvalidLtreeForDatabaseException;
@@ -24,12 +23,6 @@ public function getSQLDeclaration(array $column, AbstractPlatform $platform): st
         return 'ltree';
     }
 
-    #[\Override]
-    public function getBindingType(): ParameterType
-    {
-        return ParameterType::STRING;
-    }
-
     #[\Override]
     public function getMappedDatabaseTypes(AbstractPlatform $platform): array
     {