[RFC] perf record: dead code perf_event__synthesize_id_index()

[Stephane Eranian]

Hi,

It looks like perf_event__synthesize_id_index() is dead code in the current
tip
tree. I don't see any invocation of the function anywhere in perf.I
understand why
you'd want to keep the rest of the code related to  PERF_RECORD_ID_INDEX
because some perf.data file may have this user-level record type. But the
synthesize code is not needed anymore, in my opinion.

Shouldn't we remove this code?