vl: remove bios_name

bios_name was a legacy variable used by machine code, but it is
no more.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20201026143028.3034018-16-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/sysemu/sysemu.h

@@ -8,7 +8,6 @@
 
 /* vl.c */
 
-extern const char *bios_name;
 extern int only_migratable;
 extern const char *qemu_name;
 extern QemuUUID qemu_uuid;

softmmu/vl.c

@@ -119,7 +119,6 @@
 
 static const char *data_dir[16];
 static int data_dir_idx;
-const char *bios_name = NULL;
 enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
 int display_opengl;
 const char* keyboard_layout = NULL;
@@ -4212,7 +4211,6 @@ void qemu_init(int argc, char **argv, char **envp)
     kernel_filename = qemu_opt_get(machine_opts, "kernel");
     initrd_filename = qemu_opt_get(machine_opts, "initrd");
     kernel_cmdline = qemu_opt_get(machine_opts, "append");
-    bios_name = qemu_opt_get(machine_opts, "firmware");
 
     opts = qemu_opts_find(qemu_find_opts("boot-opts"), NULL);
     if (opts) {