staging: r8188eu: remove rtl8188e_PHY_ConfigRFWithHeaderFile()

Function rtl8188e_PHY_ConfigRFWithHeaderFile() is not implemented,
remove the declaration from Hal8188EPhyCfg.h.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210828170834.31388-1-straube.linux@gmail.com


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