These days, a smart phone with a good data plan can obviate the need for a land line.

The need for a ferry was obviated once the bridge was built.

The employee's voluntary resignation obviated the necessity of firing him.

Going carless obviates the need for a dedicated parking space at home.

Dictionary apps have obviated the need for printed dictionaries.

Many languages have developed reflexive pronouns, by means of which many ambiguities are obviated.