nissa: remove obsolete TODO
USB retimers are configured as needed now, so the TODO to configure
them was obsolete.
TEST=builds
BRANCH=none
@@ -114,7 +114,6 @@ CONFIG_PLATFORM_EC_USB_PID=0x505a
CONFIG_PLATFORM_EC_USB_PD_USB4=n
CONFIG_PLATFORM_EC_USB_PD_TBT_COMPAT_MODE=n
-# TODO(b/216085548): configure USB retimers
CONFIG_PLATFORM_EC_USB_MUX_RUNTIME_CONFIG=y
CONFIG_PLATFORM_EC_USB_MUX_VIRTUAL=y
# ADL integrated muxes are slow: unblock PD
