drop dictionary error workaround
    
    Summary:
    the dictionary error bug was fixed some time back, so drop this
    workaround for it.
    
    Test Plan:
    Run all tests for F25 and Rawhide and verify they don't need
    this workaround any longer.
    
    Reviewers: jskladan, garretraziel
    
    Reviewed By: garretraziel
    
    Subscribers: tflink
    
    Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D988