glx: remove unused systemTimeExtension

Not even a single DRI2/DRISW driver in mesa ever used this. Appears to be a
dri1 artefact copy/pasted in the dri2/drisw codebase.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>

glx/glxdri2.c

@@ -767,7 +767,6 @@ static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 };
 
 static const __DRIextension *loader_extensions[] = {
-    &systemTimeExtension.base,
     &loaderExtension.base,
     &dri2UseInvalidate.base,
     NULL

glx/glxdricommon.c

@@ -41,29 +41,6 @@
 #include "glxscreens.h"
 #include "glxdricommon.h"
 
-static int
-getUST(int64_t * ust)
-{
-    struct timeval tv;
-
-    if (ust == NULL)
-        return -EFAULT;
-
-    if (gettimeofday(&tv, NULL) == 0) {
-        ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
-        return 0;
-    }
-    else {
-        return -errno;
-    }
-}
-
-const __DRIsystemTimeExtension systemTimeExtension = {
-    {__DRI_SYSTEM_TIME, 1},
-    getUST,
-    NULL,
-};
-
 #define __ATTRIB(attrib, field) \
     { attrib, offsetof(__GLXconfig, field) }
 

glx/glxdricommon.h

@@ -35,8 +35,6 @@ struct __GLXDRIconfig {
 __GLXconfig *glxConvertConfigs(const __DRIcoreExtension * core,
                                const __DRIconfig ** configs);
 
-extern const __DRIsystemTimeExtension systemTimeExtension;
-
 void *glxProbeDriver(const char *name,
                      void **coreExt, const char *coreName, int coreVersion,
                      void **renderExt, const char *renderName,

glx/glxdriswrast.c

@@ -337,7 +337,6 @@ static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 };
 
 static const __DRIextension *loader_extensions[] = {
-    &systemTimeExtension.base,
     &swrastLoaderExtension.base,
     NULL
 };