doc/02-installation.md: remove outdated info

The Backports Repository is required for Debian 9, but we don't build even v10 anymore.
Icinga · Aug 21, 2024 · 1a4f3f3 · 1a4f3f3
1 parent b3ce7ad
commit 1a4f3f3
Showing 1 changed file with 0 additions and 15 deletions.
diff --git a/doc/02-installation.md b/doc/02-installation.md
@@ -43,21 +43,6 @@ DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
 
 apt update
 ```
-
-#### Debian Backports Repository <a id="debian-backports-repository"></a>
-
-This repository is required for Debian Stretch since Icinga v2.11.
-
-Debian Stretch:
-
-```bash
-DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
- echo "deb https://deb.debian.org/debian ${DIST}-backports main" > \
- /etc/apt/sources.list.d/${DIST}-backports.list
-
-apt update
-```
-
 <!-- {% endif %} -->
 
 <!-- {% if ubuntu %} -->