remove slow timing comparsion

[dougbrn]

The timing comparison takes >5 minutes to build here, making it a disproportionate amount of the doc build time. We've seen timing to be more workflow dependent, so it seems best to just have users test ray if it's interesting to them and let them see the results for themselves.

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[github-actions]

Before [bac4fe7]	After [7d241f6]	Ratio	Benchmark (Parameter)
32.7±0.5ms	32.9±0.2ms	1.01	benchmarks.time_batch
33.7±0.4ms	34.1±0.2ms	1.01	benchmarks.time_prune_sync_workflow

Click here to view all benchmarks.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.78%. Comparing base (bac4fe7) to head (febcac6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #425   +/-   ##
=======================================
  Coverage   95.78%   95.78%           
=======================================
  Files          25       25           
  Lines        1755     1755           
=======================================
  Hits         1681     1681           
  Misses         74       74           

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