staging: wilc1000: remove coreconfigurator.h file

Remove the coreconfigurator header file, as its source file is deleted
after code refactor. Moved the required structure and prototypes to
hostinterface header.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>