qtwayland: Remove fix for glx

* resolved upstream in:
  commit 6b173d993542e2aed01b5a97d3e0fb64940ad432
  Author: Jorgen Lind <jorgen.lind@digia.com>
  Date:   Mon Mar 10 09:25:04 2014 +0100
  Subject: Fixup for GLX integration

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>