.cirrus.yml: Remove Debian Jessie.

Regular support for Jessie ended in 2018, LTS in June 2020.

diff --git a/.cirrus.yml b/.cirrus.yml
index ab88daf64005a76a58ad0e998124f359f3f4253c..3e9830703b8f9b030f054bb94c7a761c199faeed 100644 (file)
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -26,9 +26,6 @@ release_ready_task:
 #
 debian_default_toolchain_task:
   matrix:
-    - allow_failures: false
-      container:
-        image: collectd/ci:jessie_amd64
     - allow_failures: false
       container:
         image: collectd/ci:stretch_amd64