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>
diff --git a/doxygen/core_subset.doxy b/doxygen/core_subset.doxy
index dfa59f4..4123485 100644
--- a/doxygen/core_subset.doxy
+++ b/doxygen/core_subset.doxy
@@ -190,8 +190,7 @@
 # Configuration::addtions related to external references   
 #---------------------------------------------------------------------------
 TAGFILES		= \
-			 math_subset.tag=../math_subset \
-			 miniglx.tag=../miniglx
+			 math_subset.tag=../math_subset
 GENERATE_TAGFILE       = core_subset.tag
 ALLEXTERNALS           = NO
 PERL_PATH              =