Revert "feat: add websocket subscription support to router"

This reverts commit 50d1503.

Author: VictoriaBeilsten-Edmands

charts/graph/values.yaml

@@ -9,17 +9,6 @@ router:
       - --supergraph
       - /etc/apollo/supergraph.graphql
     configuration:
-      subscription:
-        enabled: true
-        mode:
-          passthrough:
-            all:
-              path: /subscriptions
-            subgraphs:
-              workflows:
-                path: /ws
-                protocol: graphql_ws
-                heartbeat_interval: 10s
       sandbox:
         enabled: true
       homepage:

supergraph-config.yaml

@@ -1,18 +1,9 @@
 federation_version: =2.8.0
-subscriptions:
-  enabled: true
-  protocols:
-    - graphql-transport-ws
-    - graphql-ws
 subgraphs:
   workflows:
     routing_url: https://workflows.diamond.ac.uk/graphql
     schema:
       file: schema/workflows.graphql
-    subscriptions:
-      enabled: true
-      protocols:
-        - graphql-ws
   instrument_sessions:
     routing_url: https://instrument-sessions.diamond.ac.uk/api/graphql
     schema: