Revert "Merge pull request #104 from ulupo/coo_format_patch"

[ulupo]

This reverts commit 07adc60.

The up-to-date version of upstream ripser which was integrated in the project by @MonkeyBreaker in #106 does not seem to suffer from the issues pointed out in #103 and addressed by #104.

It seems that there are no longer wrong outputs when sparse matrices are initialised in non-lexicographic ways. The unit test introduced by @ctralie in 1b565cf now serves as a regression test.

It would be nice to have @ubauer's or @MonkeyBreaker's confirmation that my reading of the situation is correct.

[codecov]

Codecov Report

Merging #112 into master will decrease coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #112      +/-   ##
==========================================
- Coverage   96.75%   96.64%   -0.11%     
==========================================
  Files           3        3              
  Lines         154      149       -5     
  Branches       26       25       -1     
==========================================
- Hits          149      144       -5     
  Misses          4        4              
  Partials        1        1              

Impacted Files	Coverage Δ
ripser/ripser.py	96.57% <100.00%> (-0.12%)	⬇️

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[MonkeyBreaker]

Hi !

As far as I could test with the new backend, the issue described #103 doesn't seem to appear.
One thing that's is maybe a bit late, would be to add a test case where the issue was encountered before merging #106.
If we add a test case, then it would be perfect in my opinion.

Best,
Julián