JS: Do not track returned values out of the enclosing function #10985
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reachesReturnwould in some cases track the returned value out to call sites, which doesn't lead anywhere. It could also track into callees via return edges, but that's not useful either, since summaries take care of flow through callees.This fixes a performance issue raised by #10937 (but it's possible there are more underlying issues to be fixed)
Evaluation looks neutral