drop Requires

[jverzani]

Closes #608 (should have been done much earlier)

[devmotion]

It seems the __init__() function should be removed as well.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.75%. Comparing base (fa14ce3) to head (14f5ccb).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #617      +/-   ##
==========================================
+ Coverage   76.72%   76.75%   +0.03%     
==========================================
  Files          38       38              
  Lines        4068     4065       -3     
==========================================
- Hits         3121     3120       -1     
+ Misses        947      945       -2     

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[jverzani]

Thanks @devmotion --- very much appreciated.