by David Monllaó.
Hi,
After considering the number of affected users we decided to change the issue's purpose and defer the final deprecation (where the functions are removed) to Moodle 3.0 (MDL-49414 for reference)
The changes introduced in Moodle 2.9 (MDL-43535) are just restricting new or existing web services to add deprecated functions, note that the web services already using deprecated web services will continue working until Moodle 3.0.
Attaching the list of deprecated web services: https://github.com/moodle/moodle/blob/master/webservice/upgrade.txt#L6