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[dsymutil] Remove paper trail warnings (#67041)
Remove the paper trail warning from dsymutil and the DWARF linker. The original purpose of this functionality was to leave a paper trail in the output artifact about missing object files. The current implementation however has diverged and is the source of a pretty serious bug: - In the debug map parser, missing object files are not the only warnings we emit. When paper trail warnings are enabled, all of them end up in the dSYM which wasn't the goal. - When warnings are associated with a object file in the debug map, it is skipped by the DWARF linker. This only makes sense if the object file is missing and is obviously incorrect for any other type of warning (such as a missing symbol). The combination of the two means that we can generate broken DWARF when the feature is enabled. AFAIK it was only used by Apple and nobody I spoke to has relied on it, so rather than fixing the broken behavior I propose we remove it.
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