Delete old deprecation

[mlubin]

Julia 1.0 dropped this deprecation

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@6e5f40d). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #58   +/-   ##
=========================================
  Coverage          ?   97.02%           
=========================================
  Files             ?        1           
  Lines             ?      101           
  Branches          ?        0           
=========================================
  Hits              ?       98           
  Misses            ?        3           
  Partials          ?        0           

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