It was added for llvm-symbolizer, and at the time, it was required.
However, since [1] (shipped in llvm 12), llvm-symbolizer, msdia140.dll
is not used by default, only when passing the -dia command line option,
which we don't use.
1. c74b427cb2
Differential Revision: https://phabricator.services.mozilla.com/D136821