staging: rtl8188eu: remove unused efuse hal components

struct hal_data_8188e contains some components related to efuses which
are not used for rtl8188eu.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210406204829.18130-1-martin@kaiser.cx


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