Remove unecessary "echo"

Co-authored-by: Tim Bannister <[email protected]>

Author: CarlosDomingues

content/en/docs/tasks/tools/included/optional-kubectl-configs-bash-linux.md

@@ -37,7 +37,7 @@ You now need to ensure that the kubectl completion script gets sourced in all yo
 - Add the completion script to the `/etc/bash_completion.d` directory:
 
    ```bash
-   echo -e "$(kubectl completion bash)" | sudo tee /etc/bash_completion.d/kubectl > /dev/null
+   kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
    ```
 
 If you have an alias for kubectl, you can extend shell completion to work with that alias: