Fix conda uploads

[ajschmidt8]

This PR removes some conditional statements & variables that prevent all the variants of the cugraph package from being uploaded to Anaconda.org. This is a continuation of #1709.

[ajschmidt8]

@gpucibot merge

[codecov-commenter]

Codecov Report

Merging #1712 (9ea23d9) into branch-21.08 (790a369) will increase coverage by 0.02%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-21.08    #1712      +/-   ##
================================================
+ Coverage         59.82%   59.85%   +0.02%     
================================================
  Files                77       77              
  Lines              3515     3517       +2     
================================================
+ Hits               2103     2105       +2     
  Misses             1412     1412              

Impacted Files	Coverage Δ
python/cugraph/_version.py	44.80% <0.00%> (+0.39%)	⬆️

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