configure: allow building shared-glapi powered libgl-xlib

Cc: Brian Paul <brianp@vmware.com>
Cc: Adam Jackson <ajax@redhat.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Jose Fonseca <jfonseca@vmware.com>

configure.ac

@@ -941,12 +941,6 @@ x*yes*yes*)
     ;;
 esac
 
-# Building Xlib-GLX requires shared glapi to be disabled.
-if test "x$enable_shared_glapi$enable_xlib_glx" = xyesyes; then
-    AC_MSG_NOTICE([Shared GLAPI should not used with Xlib-GLX, disabling])
-    enable_shared_glapi=no
-fi
-
 AM_CONDITIONAL(HAVE_SHARED_GLAPI, test "x$enable_shared_glapi" = xyes)
 
 # Build the pipe-drivers as separate libraries/modules.