message: fix graph-node plugin schema
diff: @@ -2,7 +2,5 @@ type Query {
  querySubgraph(
  subgraphId: String!
  query: String!
  - ): String! """JSON!"""
  - """TODO: support JSON type as base type?"""
  - """I think this would be helpful for dynamic data"""
  + ): String!
  }
  