rtl8192e: cleanup rtl_debug.h

This patch cleans up rtl_debug.h by removing all the unused defines and
stub functions.
The changes to rtl_core.c are just to remove the deleted stub function
calls.
The changes to rtl_debug.c are functions that are never called.

Signed-off-by: Sean MacLennan <seanm@seanm.ca>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>