Remove KSQO from GUC and move file to _deadcode.

Bruce Momjian <bruce@momjian.us>

Commit: 0dbfea39f313fbd24a1754a701a85815229fe262
Author: Bruce Momjian <bruce@momjian.us>
Date: 2002-06-16T00:09:12Z
Releases: 7.3.1
Remove KSQO from GUC and move file to _deadcode.

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