Steps to reproduce:

1. Create host1 (hostid1)
2. Create template t1 (templateid1) with several items
3. Link t1 with host1
4. issue API command: 
   template.massremove(templateids=[templateid1], hostids=[hostid1], templateids_clear=[templateid1])

Result:
Template t1 was unlinked from host host1 as expected, but templated items were linked directly to host host1
Expected:
Unlink template t1 and clear all items