Revert "HID: core: store the unique system identifier in hid_device"

This reverts commit 52badc06 which is
commit 1e839143 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I1c9b7949853c19e46c3dc125d8e9d7ca15ada746
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>