ath9k: rateCodeToIndex is not used, remove it

Calculation of rate indices from ratecode is done in recv.c
in a straightforward manner for both HT and legacy rates.
This variable is not needed anymore.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2 files changed