staging: rtl8188eu: remove unused enum and CONFIG

The CONFIGs, the enum and the function declaration was not being
used anywhere.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8188eu/include/odm.h
Simple merge

diff --cc drivers/staging/rtl8188eu/include/odm_HWConfig.h
Simple merge