fix(controllers): remove duplicate function

[domire8]

Description

The get_lifecycle_state function is now already defined in the controller interface since this commit. No need to define it again ourselves.

Review guidelines

Estimated Time of Review: 3 minutes

Checklist before merging:

• Confirm that the relevant changelog(s) are up-to-date in case of any user-facing changes

[bpapaspyros]

nice!