Remove some unnecessary #includes of postmaster/interrupt.h

Heikki Linnakangas <heikki.linnakangas@iki.fi>

Commit: 44913add91e789884e207f19c1d7ec067f23f6d5
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2023-12-08T11:19:37Z
Releases: 17.0
Remove some unnecessary #includes of postmaster/interrupt.h

Commit 44fc6e259b removed a bunch of references to
SignalHandlerForCrashExit, leaving these #includes unneeded.

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