SVN version/unversion file in PHPStorm

I am working with SVN for couple of projects now and have a fairly simple question I haven't been able to find a solution so far.
By a mistake I added few files into SVN (composer.json is one of them). I absolutely don't want that file on server because it has some dependencies I only use in local (Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider for example).
What is the easiest way and what is the recomended way to remove those files from SVN. I tried to add them to ignore list but nothing happenes and they are still in commit list.
I had simmilar problem on the first project with SVN under Storm and it ended in disaster because I tried with erasing files and you all know wher it led...