Revert "Merge pull request #171 from overmindtech/is-system"

This reverts commit f7389ef, reversing
changes made to c832e6f.

gateway.proto

@@ -175,10 +175,6 @@ message StoreSnapshot {
     string description = 2;
     // a correlation ID to match up requests and responses. set this to a value unique per connection
     bytes msgID = 3;
-    // whether this snapshot should be stored as a system snapshot. System
-    // snapshots are hidden and can only be returned via the UUID, they don't
-    // show up in lists
-    bool isSystem = 4;
 }
 
 // After a snapshot is successfully stored, this reply with the new snapshot's details is sent.
@@ -192,9 +188,6 @@ message SnapshotStoreResult {
     // a correlation ID to match up requests and responses. this field returns the contents of the request's msgID
     bytes msgID = 4;
     bytes snapshotID = 5; // The UUID of the newly stored snapshot
-    // System snapshots are hidden and can only be returned via the UUID, they
-    // don't show up in lists
-    bool isSystem = 6;
 }
 
 // Ask the gateway to load the specified snapshot into the current state.