python-usb: remove this package

It seems that this is not by default installed and there are no dependency in turris-os-packages either in turris-build repository. Let's remove it without providing any replacement.

lang/python-usb/Makefile

-#
-# Copyright (C) 2017-2020 CZ.NIC, z. s. p. o. (https://www.nic.cz/)
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
-
-include $(TOPDIR)/rules.mk
-
-PKG_NAME:=python-usb
-PKG_VERSION:=1.1.0
-PKG_RELEASE:=1
-
-PYPI_NAME:=pyusb
-PKG_HASH:=d69ed64bff0e2102da11b3f49567256867853b861178689671a163d30865c298
-
-PKG_MAINTAINER:=CZ.NIC <packaging@turris.cz>
-PKG_LICENSE:=BSD-3-Clause
-PKG_LICENSE_FILES:=LICENSE
-
-include $(TOPDIR)/feeds/packages/lang/python/pypi.mk
-include $(INCLUDE_DIR)/package.mk
-include $(TOPDIR)/feeds/packages/lang/python/python3-package.mk
-
-define Package/python3-usb
-  SUBMENU:=Python
-  SECTION:=lang
-  CATEGORY:=Languages
-  TITLE:=USB access for Python
-  URL:=https://pyusb.github.io/pyusb/
-  DEPENDS:=+python3-light +libusb-1.0
-  VARIANT:=python3
-endef
-
-define Package/python3-usb/description
-  The PyUSB module provides for Python easy access to the host machine's Universal
-  Serial Bus (USB) system.
-endef
-
-$(eval $(call Py3Package,python3-usb))
-$(eval $(call BuildPackage,python3-usb))
-$(eval $(call BuildPackage,python3-usb-src))