gluster: Remove unused defines and header include

Remove the definitions of GLUSTER_FD_WRITE and GLUSTER_FD_READ which are
no longer used. Also sockets.h isn't needed any more.
Signed-off-by: NBharata B Rao <bharata@linux.vnet.ibm.com>
Acked-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/gluster.c

@@ -9,7 +9,6 @@
  */
 #include <glusterfs/api/glfs.h>
 #include "block/block_int.h"
-#include "qemu/sockets.h"
 #include "qemu/uri.h"
 
 typedef struct GlusterAIOCB {
@@ -24,9 +23,6 @@ typedef struct BDRVGlusterState {
     struct glfs_fd *fd;
 } BDRVGlusterState;
 
-#define GLUSTER_FD_READ  0
-#define GLUSTER_FD_WRITE 1
-
 typedef struct GlusterConf {
     char *server;
     int port;