staging: octeon: delete my name from TODO contact

I gave up using MIPS OCTEON hardware after the drivers were deleted from
staging in 2019. Afterwards, the driver seems to be added back but the TODO
contact name was not updated accordingly. Delete my name, as I still get
mails from people asking help with the driver and their systems.

Fixes: 422d97b8 ("Revert "staging: octeon: delete driver"")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Link: https://lore.kernel.org/r/20230427211606.GD881984@darkstar.musicnaut.iki.fiSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon/TODO

@@ -6,4 +6,3 @@ TODO:
 	- make driver self-contained instead of being split between staging and
 	  arch/mips/cavium-octeon.
 
-Contact: Aaro Koskinen <aaro.koskinen@iki.fi>