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Is your feature request related to a problem? Please describe
We've discovered few duplications in #16019:
windowsandsystem-windowshttps://llvm.org/docs/CommandGuide/lit.html#default-featureslevel_zeroandlevel-zero- not sure which one should be used, there are only 2 uses oflevel-zero, the rest of tests useslevel_zero, but it looks like both options are valid.
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