doxygen: Remove references to miniglx

miniglx was removed in February 2010. Clean up remaining
unnecessary doxygen references.

  commit a9e36696837b2c31ecee4017a0adffbd987c1eff
  Author: Kristian Høgsberg <krh@bitplanet.net>
  Date:   Thu Feb 25 16:17:04 2010 -0500

      Remove remaining miniglx references

Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>
4 files changed