Remove Python2 shims

[jarrodmillman]

No description provided.

[codecov-io]

Codecov Report

Merging #37 (7f46bf5) into master (28f57a7) will increase coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #37      +/-   ##
==========================================
+ Coverage   84.16%   84.19%   +0.03%     
==========================================
  Files           6        6              
  Lines         644      639       -5     
  Branches       84       84              
==========================================
- Hits          542      538       -4     
+ Misses         86       85       -1     
  Partials       16       16              

Impacted Files	Coverage Δ
cryptorandom/cryptorandom.py	92.39% <ø> (-0.09%)	⬇️
cryptorandom/prng.py	0.00% <ø> (ø)
cryptorandom/sample.py	84.61% <0.00%> (-0.07%)	⬇️
cryptorandom/tests/test_cryptorandom.py	95.83% <ø> (-0.06%)	⬇️
cryptorandom/tests/test_sample.py	100.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 28f57a7...7f46bf5. Read the comment docs.