Remove buster and its packages

conf/distributions

conf/incoming

db/checksums.db

db/packagenames.db

db/packages.db

db/references.db

out/dists/buster/InRelease

out/dists/buster/Release

out/dists/buster/Release.gpg

out/dists/buster/main/binary-amd64/Packages

out/dists/buster/main/binary-amd64/Packages.gz

out/dists/buster/main/binary-amd64/Release

out/dists/buster/main/source/Release

out/dists/buster/main/source/Sources.gz

.../e/exim4/exim4-base-dbgsym_4.92-8+deb10u7.0qsx1_amd64.deb

...ol/main/e/exim4/exim4-base_4.92-8+deb10u7.0qsx1_amd64.deb

...ol/main/e/exim4/exim4-config_4.92-8+deb10u7.0qsx1_all.deb

...exim4-daemon-custom-dbgsym_4.92-8+deb10u7.0qsx1_amd64.deb

.../exim4/exim4-daemon-custom_4.92-8+deb10u7.0qsx1_amd64.deb

...e/exim4/exim4-daemon-heavy_4.92-8+deb10u7.0qsx1_amd64.deb