Revert: [SourceKit] Disable module system headers validation#29555

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rintaro merged 2 commits intoswiftlang:masterfrom

rintaro:revert-sourcekit-rdar58550697

Jan 31, 2020

Commits on Jan 30, 2020

Revert "[SourceKit] Disable module system headers validation"
rintaro
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Revert "[CodeCompletion] Disable module system headers validation"
rintaro
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