Remove obsolete APT repositories

These will conflict with the new signed-by versions.

roles/float-base/tasks/apt.yml

@@ -36,6 +36,14 @@
     path: "/etc/apt/trusted.gpg.d/deb_autistici_org.gpg"
     state: absent
 
+- name: Remove legacy repositories
+  apt_repository:
+    repo: "{{ item }}"
+    state: absent
+  loop:
+    - "deb http://deb.autistici.org/urepo ai3/"
+    - "deb http://deb.autistici.org/urepo buster-podman/"
+    
 - name: Install our standard sources.list
   template:
     src: "sources.list.j2"