Remove the comms import from cugraph's init file

[jnke2016]

A breaking change in 22.06 moved the functionalities of comms to cugraph/dask where it should belong as it is only part of the multi GPU API. However cugraph/__init__.py is still importing the the comms when it shouldn't.

This PR removes the comms import in cugraph/__init__.py

closes #2379
closes #2329

[codecov-commenter]

Codecov Report

Merging #2402 (3c67e42) into branch-22.08 (eae4585) will increase coverage by 0.01%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-22.08    #2402      +/-   ##
================================================
+ Coverage         60.11%   60.12%   +0.01%     
================================================
  Files               102      102              
  Lines              5155     5154       -1     
================================================
  Hits               3099     3099              
+ Misses             2056     2055       -1     

Impacted Files	Coverage Δ
python/cugraph/cugraph/__init__.py	100.00% <ø> (ø)
...ython/cugraph/cugraph/community/ktruss_subgraph.py	88.23% <0.00%> (+2.94%)	⬆️

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[rlratzel]

@gpucibot merge