doc: Remove unmaintained .deb packaging files

README.md

@@ -10,9 +10,10 @@ Bitcoin Core is also distributed on several Linux package managers:
 
 * The `bitcoin-core` snap package for https://snapcraft.io/bitcoin-core is maintained in [/snap](/snap)
 * The `org.bitcoincore.bitcoin-qt` flatpak package is maintained under their organization: https://github.com/flathub/org.bitcoincore.bitcoin-qt
-* The `bitcoin-core` guix package is maintained under https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/finance.scm
-* The `bitcoin` gentoo package is maintained under https://gitlab.com/bitcoin/gentoo
-* The [/debian](/debian) packaging is currently unmaintained, see https://github.com/bitcoin-core/packaging/issues/36
 
 An RPM spec file was removed in commit fa7c698cb24bab350b40ee2d825c443dabdd9633, because is was unmaintained and
 outdated.
+
+The ".deb" packaging files were removed in commit
+ae86c21b6068a6fde3fad01a0fb8e99a730860f5, because they were unmaintained and
+outdated.