skip external env docs for now

Author: skudasov

book/src/SUMMARY.md

@@ -8,9 +8,9 @@
     - [Connecting Chainlink Node (Multiple networks)]()
     - [NodeSet Environment](./framework/nodeset_environment.md)
     - [NodeSet with Capabilities](./framework/nodeset_capabilities.md)
-    - [NodeSet with External Blockchain](./framework/nodeset_external.md)
     - [NodeSet (Local Docker builds)](./framework/nodeset_docker_rebuild.md)
     - [NodeSet Compat Environment](./framework/nodeset_compatibility.md)
+    - [NodeSet with External Blockchain]()
     - [CLI](./framework/cli.md)
     - [Configuration](./framework/configuration.md)
     - [Test Configuration](./framework/test_configuration_overrides.md)