staging: r8188eu: remove unused odm_Init_RSSIForDM()

Function odm_Init_RSSIForDM() is unused and empty, remove it.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210908230953.16931-2-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>