fix tests

Author: kirillbor1

src/PostgresConnection.php

@@ -12,7 +12,6 @@
 use Umbrellio\Postgres\Extensions\AbstractExtension;
 use Umbrellio\Postgres\Extensions\Exceptions\ExtensionInvalidException;
 use Umbrellio\Postgres\Schema\Builder;
-use Umbrellio\Postgres\Schema\Grammars\PostgresGrammar;
 use Umbrellio\Postgres\Schema\Types\NumericType;
 use Umbrellio\Postgres\Schema\Types\TsRangeType;
 use Umbrellio\Postgres\Schema\Types\TsTzRangeType;
@@ -106,11 +105,6 @@ public function prepareBindings(array $bindings)
         return parent::prepareBindings($bindings);
     }
 
-    protected function getDefaultSchemaGrammar()
-    {
-        return parent::getDefaultSchemaGrammar();
-    }
-
     private function registerInitialTypes(): void
     {
         foreach ($this->initialTypes as $type => $typeClass) {