diff --git a/src/PgSqlCommandResult.php b/src/PgSqlCommandResult.php
deleted file mode 100644
index 9f8926b..0000000
--- a/src/PgSqlCommandResult.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-
-namespace Amp\Postgres;
-
-use Amp\Sql\CommandResult;
-
-final class PgSqlCommandResult implements CommandResult
-{
-    /** @var resource PostgreSQL result resource. */
-    private $handle;
-
-    /**
-     * @param resource $handle PostgreSQL result resource.
-     */
-    public function __construct($handle)
-    {
-        $this->handle = $handle;
-    }
-
-    /**
-     * Frees the result resource.
-     */
-    public function __destruct()
-    {
-        \pg_free_result($this->handle);
-    }
-
-    /**
-     * @return int Number of rows affected by the INSERT, UPDATE, or DELETE query.
-     */
-    public function getAffectedRowCount(): int
-    {
-        return \pg_affected_rows($this->handle);
-    }
-}
diff --git a/src/PqCommandResult.php b/src/PqCommandResult.php
deleted file mode 100644
index 194882a..0000000
--- a/src/PqCommandResult.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-namespace Amp\Postgres;
-
-use Amp\Sql\Result;
-use pq;
-
-final class PqCommandResult implements Result
-{
-    /** @var \pq\Result PostgreSQL result object. */
-    private $result;
-
-    /**
-     * @param \pq\Result $result PostgreSQL result object.
-     */
-    public function __construct(pq\Result $result)
-    {
-        $this->result = $result;
-    }
-
-    /**
-     * @return int Number of rows affected by the INSERT, UPDATE, or DELETE query.
-     */
-    public function getAffectedRowCount(): int
-    {
-        return $this->result->affectedRows;
-    }
-}