GUI/Peers: Drop redundant Network column

Network addresses already very obviously imply a specific network, so naming the network separately just wastes space

Author: luke-jr

src/qt/peertablemodel.h

@@ -49,11 +49,11 @@ class PeerTableModel : public QAbstractTableModel
         NetNodeId = 0,
         Address,
         ConnectionType,
-        Network,
         Ping,
         Sent,
         Received,
-        Subversion
+        Subversion,
+        Network,  // Not used, just kept at the end to avoid excessive code removal
     };
 
     enum {
@@ -87,9 +87,6 @@ public Q_SLOTS:
         /*: Title of Peers Table column which describes the type of
             peer connection. The "type" describes why the connection exists. */
         tr("Type"),
-        /*: Title of Peers Table column which states the network the peer
-            connected through. */
-        tr("Network"),
         /*: Title of Peers Table column which indicates the current latency
             of the connection with the peer. */
         tr("Ping"),