Remove unused QueryView.resumeToken

Author: wilhuff

packages/firestore/src/core/sync_engine.ts

@@ -77,12 +77,6 @@ class QueryView {
      * stream to identify this query.
      */
     public targetId: TargetId,
-    /**
-     * An identifier from the datastore backend that indicates the last state
-     * of the results that was received. This can be used to indicate where
-     * to continue receiving new doc changes for the query.
-     */
-    public resumeToken: ProtoByteString,
     /**
      * The view is responsible for computing the final merged truth of what
      * docs are in the query. It gets notified of local and remote changes,
@@ -198,7 +192,6 @@ export class SyncEngine implements RemoteSyncer {
               const data = new QueryView(
                 query,
                 queryData.targetId,
-                queryData.resumeToken,
                 view
               );
               this.queryViewsByQuery.set(query, data);