remove tsp implementation from 21.10

[ChuckHastings]

TSP implementation being removed

[codecov-commenter]

Codecov Report

Merging #1812 (8152127) into branch-21.10 (bf64c2c) will decrease coverage by 58.00%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-21.10   #1812       +/-   ##
================================================
- Coverage         59.85%   1.84%   -58.01%     
================================================
  Files                77       5       -72     
  Lines              3547     325     -3222     
================================================
- Hits               2123       6     -2117     
+ Misses             1424     319     -1105     

Impacted Files	Coverage Δ
python/cugraph/structure/convert_matrix.py
...raph/structure/graph_implementation/simpleGraph.py
python/cugraph/traversal/sssp.py
python/cugraph/traversal/bfs.py
python/cugraph/community/subgraph_extraction.py
python/cugraph/utilities/grmat.py
python/cugraph/dask/community/__init__.py
python/cugraph/community/ecg.py
python/cugraph/community/__init__.py
python/cugraph/utilities/path_retrieval.py
... and 69 more

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[BradReesWork]

@gpucibot merge