CSV file storage is not handled properly in CRM Core Data Import module

Hi,

When importing a CSV file with CRM Core Data Import module, it is saved as a managed file with temporary status and registered for usage by the 'file' module.
The usage is never removed, even when one uninstalls the CRM Core Data Import module.

This causes messages similar to the one below to appear in the watchdog:

Did not delete temporary file "public://crm_0.csv" during garbage collection, because it is in use by the following modules: file.

(These messages are generated by Drupal core's system_cron() function that tries to delete temporary unused managed files.)

Regards,

Martin