Delete LinkerDuplicateSymbolsLocationCaptureGroup

[cpisciotta]

As a prerequisite to #365, delete this overly-generic definition that conflicts with ShellCommandCaptureGroup. Given there aren't tests against this regular expression, it's unclear what output it actually expects and how it differs from LinkerDuplicateSymbolsCaptureGroup. Given this definition is formatted as nil output, we can safely delete this type; deleting this type won't impact user-facing logs, so the only known trade-off is a potential time regression.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.52%. Comparing base (9a55533) to head (423f4dd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #368      +/-   ##
==========================================
+ Coverage   90.20%   90.52%   +0.32%     
==========================================
  Files          17       17              
  Lines        2481     2470      -11     
==========================================
- Hits         2238     2236       -2     
+ Misses        243      234       -9     

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