staging: rtl8188eu: Remove functions initialize rtw_[read,write] wrapper

we have removed all rtw_[read,write]() function calls,
so no need to initialize structures used to build rtw_[read,write]
abstraction.

Signed-off-by: navin patidar <navin.patidar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>