Final answer:
The item that was deleted from the previous version of the competency assessment is Measurement of client progress.
Step-by-step explanation:
To identify which item was deleted from the previous version of the competency assessment, we need to compare the options provided with the previous version. Based on the options given, the item that was deleted is Measurement of client progress. The other options, such as Assessment of ethical considerations, Documentation and reporting, and Observation and data collection, are still included in the current version.