Assigned users without CC_AGENT role

[danielfdsilva]

Scenario:
User A has CC_AGENT role.
User A is assigned to Survey 1 using the manage agents form.
CC_AGENT role is removed from User A.
User A will no longer be able to perform agent tasks (collect data, view call activity)
User A will still be assigned to Survey 1
User A will not show in the manage agents form making impossible its unassignment.

In any case, if User A has 'enketo collect data assigned' permission he/she will still be able to collect data even though the user is not an agent