Drop countable interface from command result

lib/CommandResult.php

@@ -2,7 +2,7 @@
 
 namespace Amp\Postgres;
 
-interface CommandResult extends \Countable, Result {
+interface CommandResult extends Result {
     /**
      * Returns the number of rows affected by the query.
      *

lib/PgSqlCommandResult.php

@@ -33,11 +33,4 @@ class PgSqlCommandResult implements CommandResult {
     public function lastOid(): string {
         return (string) \pg_last_oid($this->handle);
     }
-
-    /**
-     * @return int
-     */
-    public function count(): int {
-        return $this->affectedRows();
-    }
-}
+}

lib/PqCommandResult.php

@@ -20,11 +20,4 @@ class PqCommandResult implements CommandResult {
     public function affectedRows(): int {
         return $this->result->affectedRows;
     }
-
-    /**
-     * @return int
-     */
-    public function count() {
-        return $this->affectedRows();
-    }
-}
+}