exec: Remove unused global variable phys_ram_fd

It seems to be unused since several years (commit
be995c27 in 2006).
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Message-id: 1373044036-14443-1-git-send-email-sw@weilnetz.de
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

exec.c

@@ -53,7 +53,6 @@
 //#define DEBUG_SUBPAGE
 
 #if !defined(CONFIG_USER_ONLY)
-int phys_ram_fd;
 static int in_migration;
 
 RAMList ram_list = { .blocks = QTAILQ_HEAD_INITIALIZER(ram_list.blocks) };

include/exec/cpu-all.h

@@ -447,7 +447,6 @@ hwaddr cpu_get_phys_page_debug(CPUArchState *env, target_ulong addr);
 
 /* memory API */
 
-extern int phys_ram_fd;
 extern ram_addr_t ram_size;
 
 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */