qed: Remove unused qed_memset_*ctx functions

qed_memset_session_ctx() and qed_memset_task_ctx() were added in 2017
as part of
commit da090917 ("qed*: Utilize FW 8.33.1.0")

but have not been used.

Remove them.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://patch.msgid.link/20250414005247.341243-2-linux@treblig.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>