Delete references to unimplemented hello3 operation

Author: dandavison

hello_nexus/caller/workflows_via_interface.py

@@ -91,15 +91,3 @@ async def run(self, name: str) -> HelloOutput:
             HelloInput(name),
         )
         return await handle
-
-
-@workflow.defn
-class Hello3CallerWorkflow(CallerWorkflowBase):
-    @xray.start_as_current_workflow_method_span()
-    @workflow.run
-    async def run(self, name: str) -> HelloOutput:
-        handle = await self.nexus_client.start_operation(
-            MyNexusService.hello3,
-            HelloInput(name),
-        )
-        return await handle

hello_nexus/service/interface.py

@@ -32,4 +32,3 @@ class MyNexusService:
     echo2: nexusrpc.interface.Operation[EchoInput, EchoOutput]
     hello2: nexusrpc.interface.Operation[HelloInput, HelloOutput]
     echo3: nexusrpc.interface.Operation[EchoInput, EchoOutput]
-    hello3: nexusrpc.interface.Operation[HelloInput, HelloOutput]