Makefile warnings on master branch

[X Xiao]

I did a git pull yesterday and saw the below warnings:

WARNING: Makefile 'package/feeds/packages/apcupsd/Makefile' has a
dependency on 'libusb-compat', which does not exist
WARNING: Makefile 'package/feeds/packages/avrdude/Makefile' has a
dependency on 'libusb-compat', which does not exist
WARNING: Makefile 'package/feeds/packages/conntrack-tools/Makefile'
has a dependency on 'libnetfilter-cttimeout', which does not
existWARNING: Makefile
'package/feeds/packages/conntrack-tools/Makefile' has a dependency on
'libnetfilter-cthelper', which does not exist
WARNING: Makefile 'package/feeds/packages/conntrack-tools/Makefile'
has a dependency on 'libnetfilter-queue', which does not exist
WARNING: Makefile 'package/feeds/packages/conntrack-tools/Makefile'
has a dependency on 'libnetfilter-cttimeout', which does not exist
WARNING: Makefile 'package/feeds/packages/conntrack-tools/Makefile'
has a dependency on 'libnetfilter-cthelper', which does not exist
WARNING: Makefile 'package/feeds/packages/conntrack-tools/Makefile'
has a dependency on 'libnetfilter-queue', which does not exist
WARNING: Makefile 'package/feeds/packages/ulogd/Makefile' has a
dependency on 'libnetfilter-log', which does not exist

Recently related packages are removed from openwrt core base, but
those changes should not lead to warnings like above. How can I get
rid of them?