What term describes the removal of support for outdated API functions?

The term that accurately describes the removal of support for outdated API functions is API Deprecation. When an API is marked as deprecated, it indicates that certain functions or methods are still available for use but are discouraged, and it is recommended that developers transition to the newer alternatives. Deprecation serves as a warning to developers that the function may be removed in a future release. This management practice helps maintain code longevity and encourages best practices by guiding developers towards more current and efficient methods.

API Deprecation is crucial in software development as it facilitates a smoother transition phase for developers, allowing them time to adapt their applications without immediate disruption. This concept ensures that users of the API are informed about which functionalities they should avoid relying on for long-term projects, ultimately promoting better software development practices.