No. A landlord can never just change locks to evict a tenant. A landlord cannot just call the sheriff. Without a court order, the sheriff cannot evict a tenant.
This is true even if the landlord is not interested in trying to collect money owed, there is no written rental agreement, there was a lease that has now expired, or any other reason. The landlord must always go through the eviction process in court if the tenant refuses to leave.