driver core: remove dev_bin_attrs from struct class

No in-kernel code is now using this, they have all be converted over to
using the bin_attrs support in attribute groups, so this field, and the
code in the driver core that was creating/remove the binary files can be
removed.

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

diff --cc drivers/base/core.c
Simple merge

diff --cc include/linux/device.h
Simple merge