Remove "Tanglu" config for Acquire::Changelogs and as vendor

This is an inactive derivative according to the census, and all the URLs which
are part of tanglu.org are dead.

apt-pkg/init.cc

@@ -205,7 +205,6 @@ bool pkgInitConfig(Configuration &Cnf)
    Cnf.CndSet("Acquire::IndexTargets::deb-src::Sources::Optional", false);
 
    Cnf.CndSet("Acquire::Changelogs::URI::Origin::Debian", "https://metadata.ftp-master.debian.org/changelogs/@CHANGEPATH@_changelog");
-   Cnf.CndSet("Acquire::Changelogs::URI::Origin::Tanglu", "http://metadata.tanglu.org/changelogs/@CHANGEPATH@_changelog");
    Cnf.CndSet("Acquire::Changelogs::URI::Origin::Ubuntu", "https://changelogs.ubuntu.com/changelogs/pool/@CHANGEPATH@/changelog");
    Cnf.CndSet("Acquire::Changelogs::AlwaysOnline::Origin::Ubuntu", true);
 

vendor/tanglu/apt-vendor.ent

@@ -1,14 +0,0 @@
-<!-- details about the keys used by the distribution -->
-<!ENTITY keyring-distro "Tanglu">
-<!ENTITY keyring-package "<package>tanglu-archive-keyring</package>">
-<!ENTITY keyring-filename "<filename>/usr/share/keyrings/tanglu-archive-keyring.gpg</filename>">
-<!ENTITY keyring-removed-filename "<filename>/usr/share/keyrings/tanglu-archive-removed-keys.gpg</filename>">
-<!ENTITY keyring-master-filename "">
-<!ENTITY keyring-uri "">
-<!ENTITY current-codename "bartholomea">
-
-<!ENTITY sourceslist-list-format "deb http://archive.tanglu.org/tanglu &current-codename; main contrib non-free">
-<!ENTITY sourceslist-sources-format "Types: deb
-URIs: http://archive.tanglu.org/tanglu
-Suites: &current-codename;
-Components: main contrib non-free">

vendor/tanglu/sources.list.in

@@ -1,7 +0,0 @@
-# See sources.list(5) manpage for more information
-
-deb http://archive.tanglu.org/tanglu &current-codename; main contrib non-free
-#deb-src http://archive.tanglu.org/tanglu &current-codename; main contrib non-free
-
-#deb http://archive.tanglu.org/tanglu &current-codename;-updates main contrib non-free
-#deb-src http://archive.tanglu.org/tanglu &current-codename;-updates main contrib non-free