doc: admin-guide/kernel-parameters: remove useless comment

This comment about DRM drivers has been there since the first git
commit. It simply doesn't belong in kernel-parameters; remove it.
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240111085220.3693059-1-vegard.nossum@oracle.com

Documentation/admin-guide/kernel-parameters.rst

@@ -218,8 +218,3 @@ bytes respectively. Such letter suffixes can also be entirely omitted:
 
 .. include:: kernel-parameters.txt
    :literal:
-
-Todo
-----
-
-	Add more DRM drivers.