pyusb: upgrade from 1.0.2 to 1.1.1

pyusb 1.0.2 is bugged and causes servod to segfault when run in a VM.
pyusb 1.1.1 fixes this bug.
Upgrade made using `cros_portage_upgrade` after which the following changes has been applied:
- dev-python/pyusb/pyusb-1.1.1.ebuild: change PYTHON_COMPAT to support python2.7/3.6 and above
- eclass/python-utils-r1.eclass: file deleted

BUG=b:191332211
TEST=run servod in a VM to check that it does not segfault anynore
TEST=connect to ec_uart_pty through servod4.1 on storo360
TEST=FEATURES=test emerge-octopus autotest

Change-Id: If985b0e8908380cf3ee4e2bec2fa5f0e457cf35b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2977555
Tested-by: Romaric Jodin <rjodin@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Romaric Jodin <rjodin@chromium.org>
6 files changed