Remove a few of the new DROP-IF-EXISTS regression tests.

Robert Haas <rhaas@postgresql.org>

Commit: 0bf08994934d8e561c2cacc4fb4fc7e7eb602d2e
Author: Robert Haas <rhaas@postgresql.org>
Date: 2011-10-20T03:38:06Z
Releases: 9.2.0
Remove a few of the new DROP-IF-EXISTS regression tests.

Commit 3301c83536e9da1e573e24ded2e610062dbf9cdc broke the build farm.
Let's try to fix that.

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