Remove dead coordinate system code

[tonypr]

The code being removed is not referenced elsewhere in the code base (i.e. it's dead code). Removing to help reduce the size of the code base overall.

[netlify]

👷 Deploy request for catanatron-staging pending review.

Visit the deploys page to approve it

Name	Link
🔨 Latest commit	655b0c4

[coveralls]

Pull Request Test Coverage Report for Build 9728435812

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.07%) to 95.804%

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Totals
Change from base Build 8157180417:	-0.07%
Covered Lines:	1347
Relevant Lines:	1406

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9728786968

Details

• 19 of 19 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.02%) to 95.851%

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Totals
Change from base Build 8157180417:	-0.02%
Covered Lines:	1340
Relevant Lines:	1398

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9729177722

Details

• 20 of 20 (100.0%) changed or added relevant lines in 2 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 95.696%

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Files with Coverage Reduction	New Missed Lines	%
catanatron_core/catanatron/models/actions.py	1	96.03%

Totals
Change from base Build 8157180417:	-0.2%
Covered Lines:	1334
Relevant Lines:	1394

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💛 - Coveralls

[tonypr]

Whoops, I only wanted to submit a PR for some changes, not what's currently at "master" on my forked repo. Closing