docs/system: remove extraneous sentence Lest we confuse the reader about something we are no longer showing in the example. Fixes: 132f8ec799c (target/arm: change default pauth algorithm to impdef) Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-id: 20260406165648.997995-1-alex.bennee@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>