ssh: remove some leftover hosts

.ssh/config

@@ -8,30 +8,20 @@ Include ~/.ssh/bwnodes
 Host qzwi
     #HostName 2a00:f820:528::4
     HostName 31.47.232.108
+    LocalForward 3389 localhost:389
+
+Host proxmox-backupstorage
+    HostName 2a01:4f9:6b:2d99::2
+    User root
 
 Host luther-netcup
     HostName 46.38.249.46
     User sub4632_80
 
-Host shells
-    HostName shells.entropia.de
-    Port 22
-    User kunsi
-
 Host voellerei
     HostName voellerei.club.entropia.de
     Port 22
     User entropia
 
-Host raeumlichkeit
-    HostName raeumlichkeit.club.entropia.de
-    Port 22
-    User kunsi
-
-Host poc
-    HostName poc-gw.entropia.de
-    Port 22
-    User kunsi
-
 Host router-remote
     HostName franzi-home.kunbox.net