Remove existing throw

[mjesun]

Summary

The throw was added to clarify a complex behavior, like matching --onlyChanged with a pattern. However, this makes impossible to have a default to run tests related to the commit that can also be overridden via CLI with --all, or use a pattern. Which, in fact, it already existed.

Test plan

Run jest --onlyChanged foo; and all foo tests should be run without throwing an exception. This is because the pattern will take precedence over --onlyChanged.

[codecov-io]

Codecov Report

Merging #4417 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4417   +/-   ##
=======================================
  Coverage   56.84%   56.84%           
=======================================
  Files         191      191           
  Lines        6472     6472           
  Branches        6        6           
=======================================
  Hits         3679     3679           
  Misses       2790     2790           
  Partials        3        3

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[github-actions]

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