Delete dead batch2 code.

[michaelabuckley]

No description provided.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.09 🎉

Comparison is base (2f5ffe7) 81.32% compared to head (7248a07) 81.41%.

❗ Current head 7248a07 differs from pull request most recent head 88dff2e. Consider uploading reports for the commit 88dff2e to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #4791      +/-   ##
============================================
+ Coverage     81.32%   81.41%   +0.09%     
- Complexity    23650    25038    +1388     
============================================
  Files          1425     1535     +110     
  Lines         86399    91834    +5435     
  Branches      11677    12294     +617     
============================================
+ Hits          70265    74769    +4504     
- Misses        10947    11617     +670     
- Partials       5187     5448     +261     

see 1493 files with indirect coverage changes

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