openrisc: Remove unused declaration of __initramfs_start

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jonas Bonn <jonas@southpole.se>
diff --git a/arch/openrisc/kernel/vmlinux.h b/arch/openrisc/kernel/vmlinux.h
index 3f7b2b2..70b9ce4 100644
--- a/arch/openrisc/kernel/vmlinux.h
+++ b/arch/openrisc/kernel/vmlinux.h
@@ -3,7 +3,6 @@
 
 #ifdef CONFIG_BLK_DEV_INITRD
 extern char __initrd_start, __initrd_end;
-extern char __initramfs_start;
 #endif
 
 extern u32 __dtb_start[];