You could reconstruct a URL through using queryString and path from the request object. Then redirect that back (without the delete parameter) How to get query string parameters in java play framework?

Or if you have the call setup in the routes file to parse out, use the reverse route minus the delete parameter. Play Framework - Redirect with params

  def index() = Action { request =>
    import play.api.Play.current
    val allWithoutDel = request.queryString - "del"   //del is the query parameter
    val url = request.path + // fold or map the allWithoutDel down to a URL string again

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