glx: Drop references to <GL/internal/glcore.h>

This header is a truly ancient remnant of the SGI SI code, which used
the same struct for visual/fbconfig state on both sides of the wire.
We're not using this struct ourselves so let's stop depending on the
header.

Signed-off-by: Adam Jackson <ajax@redhat.com>

hw/dmx/glxProxy/glxcontext.h

@@ -33,8 +33,6 @@
 
 typedef struct __GLXcontextRec __GLXcontext;
 
-#include "GL/internal/glcore.h"
-
 struct __GLXcontextRec {
     /*
      ** list of context structs

hw/dmx/glxProxy/glxscreens.h

@@ -31,8 +31,6 @@
  * Silicon Graphics, Inc.
  */
 
-#include "GL/internal/glcore.h"
-
 typedef struct {
 
     __GLXvisualConfig *pGlxVisual;

hw/xquartz/GL/glcontextmodes.h

@@ -30,8 +30,6 @@
 #ifndef GLCONTEXTMODES_H
 #define GLCONTEXTMODES_H
 
-#include "GL/internal/glcore.h"
-
 #if !defined(IN_MINI_GLX)
 extern GLint
 _gl_convert_from_x_visual_type(int visualType);

hw/xquartz/GL/visualConfigs.c

@@ -51,7 +51,6 @@
 #include <glxcontext.h>
 #include <glxext.h>
 #include <glxutil.h>
-#include <GL/internal/glcore.h>
 
 #include "capabilities.h"
 #include "visualConfigs.h"