Update info how to manage linux@psi.ch

engineering-guide/infrastructure_administration.md

@@ -96,33 +96,8 @@ The HTTPS certificates of the domain linux.psi.ch is managed by the network team
 ## Email Lists
 
 ### linux@psi.ch
-
-Right now following people are on the list:
-- Marc Caubet
-- Derek Feichtinger
-- Peter Huesser
-- Rene Kapeller
-- Gilles Martin
-- Leonardo Sala
-- Ivano Talamo
-- Alvise Dorigo
-- Joshua Taylor
-- Simon Ebner
-- Konrad Bucheli
+The purpose of this list is for the communication between the main Linux engineers here at PSI.
 
 This email list is administered by Outlook in the following way (if you have manager right):
-
-- Open outlook and go to the address book
-
 ![outlook_01.png](infrastructure_administration/outlook_01.png)
-
-- Search for the PSI.Linux mailing list and double click
-
 ![outlook_02.png](infrastructure_administration/outlook_02.png)
-
-- Go to modify members (you only see this if you are a manager)
-
-![outlook_03.png](infrastructure_administration/outlook_03.png)
-- Click on Add and add a new email address
-
-![outlook_04.png](infrastructure_administration/outlook_04.png)