seccomp: Remove 2-phase API documentation

Fixes: 8112c4f1 ("seccomp: remove 2-phase API")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Kees Cook <keescook@chromium.org>

arch/Kconfig

@@ -336,17 +336,6 @@ config HAVE_ARCH_SECCOMP_FILTER
 	    results in the system call being skipped immediately.
 	  - seccomp syscall wired up
 
-	  For best performance, an arch should use seccomp_phase1 and
-	  seccomp_phase2 directly.  It should call seccomp_phase1 for all
-	  syscalls if TIF_SECCOMP is set, but seccomp_phase1 does not
-	  need to be called from a ptrace-safe context.  It must then
-	  call seccomp_phase2 if seccomp_phase1 returns anything other
-	  than SECCOMP_PHASE1_OK or SECCOMP_PHASE1_SKIP.
-
-	  As an additional optimization, an arch may provide seccomp_data
-	  directly to seccomp_phase1; this avoids multiple calls
-	  to the syscall_xyz helpers for every syscall.
-
 config SECCOMP_FILTER
 	def_bool y
 	depends on HAVE_ARCH_SECCOMP_FILTER && SECCOMP && NET