Quant purger clear registry button doesn't work

Problem/Motivation

If you configure the Quant Purger module via the Purge UI module and click the Clear the registry button, it doesn't truncate the purge_queuer_quant table.

Steps to reproduce

1. Install and configure Quant, Quant, Quant Purger, Purge and Purge UI modules
2. Seed Quant with nodes
3. Check the purge_queuer_quant db table and it should have entries
4. Go to /admin/config/development/performance/purge
5. Click Configure in the Purge Quant dropdown
6. Click the Clear the registry button
7. Check the purge_queuer_quant db table
8. Result: Table still has data
9. Expected result: Table is empty

Proposed resolution

Missing ->execute() in the code.

Remaining tasks

• Update code
• Review and test
• Commit as applicable

User interface changes

API changes

Data model changes

Data is removed as expected.