alter Installer

Author: supremacia

src/Installer.php

@@ -8,7 +8,6 @@
 use Composer\Composer;
 use Composer\IO\IOInterface;
 use Composer\Repository\InstalledRepositoryInterface;
-use Composer\Package\PackageInterface;
 use Composer\Util\Filesystem;
 use Composer\Util\Silencer;