style(adapters): drop unused imports

Pool never references Database and SQL never references Index in code
or docblocks; Pint missed them because its comment check matches the
lowercase prose words "database" and "index".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: abnegate

src/Database/Adapter/Pool.php

@@ -8,7 +8,6 @@
 use Utopia\Database\Attribute;
 use Utopia\Database\Capability;
 use Utopia\Database\Change;
-use Utopia\Database\Database;
 use Utopia\Database\Document;
 use Utopia\Database\Event;
 use Utopia\Database\Exception as DatabaseException;

src/Database/Adapter/SQL.php

@@ -39,7 +39,6 @@
 use Utopia\Database\Hook\Tenancy;
 use Utopia\Database\Hook\TenantFilter;
 use Utopia\Database\Hook\WriteContext;
-use Utopia\Database\Index;
 use Utopia\Database\Operator;
 use Utopia\Database\OperatorType;
 use Utopia\Database\PDO as DatabasePDO;