staging: rtl8192e: Remove unused constants

Remove unused constants: IC_VersionCut_C, IC_VersionCut_E, WA_IOT_TH_VAL

Signed-off-by: Teddy Engel <engel.teddy@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/0ff436b8aa199829728ee11d0ed302e3fa6fd2ac.1718309120.git.engel.teddy@gmail.com


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