Update debian.md

docs/sources/installation/debian.md

@@ -39,13 +39,6 @@ If you install from the APT repository, then Grafana is automatically updated ev
 sudo apt-get install -y apt-transport-https
 sudo apt-get install -y software-properties-common wget
 wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add -
-
-
-# Alternatively you can add the beta repository, see in the table above
-sudo add-apt-repository "deb https://packages.grafana.com/enterprise/deb stable main"
-
-sudo apt-get update
-sudo apt-get install grafana-enterprise
 ```
 
 #### To install the latest OSS release:
@@ -54,12 +47,6 @@ sudo apt-get install grafana-enterprise
 sudo apt-get install -y apt-transport-https
 sudo apt-get install -y software-properties-common wget
 wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add -
-
-# Alternatively you can add the beta repository, see in the table above
-sudo add-apt-repository "deb https://packages.grafana.com/oss/deb stable main"
-
-sudo apt-get update
-sudo apt-get install grafana
 ```
 
 ### Set up repository for ARM