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>

docs/system/introduction.rst

diff --git a/docs/system/introduction.rst b/docs/system/introduction.rst
index be387a6..bec7291 100644
--- a/docs/system/introduction.rst
+++ b/docs/system/introduction.rst
@@ -165,10 +165,8 @@
     -m 4096 \
 
 We then define the 4 vCPUs using the ``max`` option which gives us all
-the Arm features QEMU is capable of emulating. We enable a more
-emulation friendly implementation of Arm's pointer authentication
-algorithm. We explicitly specify TCG acceleration even though QEMU
-would default to it anyway.
+the Arm features QEMU is capable of emulating. We explicitly specify
+TCG acceleration even though QEMU would default to it anyway.
 
 .. code::