remove outdated mnt/data3 info

docs/distributions/architecture.md

@@ -24,16 +24,6 @@ The following symlinks exist, linked to the above git repository.
 | /mnt/data3 | Production area (flash cephfs) |
 | /eos/project	| Archive area |
 
-## /mnt/data3
-* The flash cephfs storage (/mnt/data3) has limited quota, however is much faster than the standard cephfs cluster. For this reason we host the most actively used content from this location.
-* To avoid channging urls for content, we use symlinks from /mnt/data1 (which is the DocumentRoot for linuxsoft.cern.ch) to /mnt/data3. This is documented as follows:
-
-| /mnt/data1 Path | /mnt/data3 Path | Content
-| -- | -- | --- |
-| /mnt/data1/dist/centos | /mnt/data3/centos | Upstream CentOS repository |
-| /mnt/data1/dist/cern/centos | /mnt/data3/cern/centos | CERN CentOS |
-| /mnt/data1/dist/internal/repos | /mnt/data3/internal/repos | Koji repos |
-
 ## lxsoft update hosts
 
 these hosts are used for testing purposes