Revert DTrace patch from Robert Lor

Bruce Momjian <bruce@momjian.us>

Commit: 0e550ff6174ebe8bab15b1218fa336e484513a61
Author: Bruce Momjian <bruce@momjian.us>
Date: 2009-04-02T20:59:10Z
Releases: 8.4.0
Revert DTrace patch from Robert Lor

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