binfmt: remove taso from linux_binprm struct

With commit 987f20a9dc ("a.out: Remove the a.out implementation"), the
use of the special taso flag for alpha architectures in the linux_binprm
struct is gone.

Remove the definition of taso in the linux_binprm struct.

No functional change.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220929203903.9475-1-lukas.bulwahn@gmail.com

include/linux/binfmts.h

@@ -43,9 +43,6 @@ struct linux_binprm {
 		 * original userspace.
 		 */
 		point_of_no_return:1;
-#ifdef __alpha__
-	unsigned int taso:1;
-#endif
 	struct file *executable; /* Executable to pass to the interpreter */
 	struct file *interpreter;
 	struct file *file;