Drop tails from endpoints file

Tails is not working, so dropping references to it.

endpoints.yml

@@ -336,20 +336,6 @@ endpoints:
     version: rolling
     flavor: xfce
     kernel: kali-xfce-squash
-  tails-4.0-live-kernel:
-    path: /debian-core-10/releases/download/5.3.2-1-8095e6f1/
-    files:
-    - initrd
-    - vmlinuz
-    os: tails
-    version: '4.0'
-  tails-4.0-default-squash:
-    path: /debian-squash/releases/download/4.0-41d3900f/
-    files:
-    - filesystem.squashfs
-    os: tails
-    version: '4.0'
-    kernel: tails-4.0-live-kernel
   pop-19.10-default-squash:
     path: /ubuntu-squash/releases/download/10-bdc3fe0a/
     files: