Method remove_plan

datafusion-examples/examples/flight/sql_server.rs:203–206

(&self, handle: &str)

    }

    fn remove_plan(&self, handle: &str) -> Result<(), Status> {
        self.statements.remove(&handle.to_string());
        Ok(())
    }

    fn remove_result(&self, handle: &str) -> Result<(), Status> {
        self.results.remove(&handle.to_string());