package/pigpio: remove package

Build is broken with gcc 15.x.

Debian removed the package in 2025:
https://tracker.debian.org/news/1668850/pigpio-removed-from-testing/

Last upstream commit: March 2021
Open PR: 21
Open issues: 87

One of the open issues mentions incompatibility with Pi 5+:
https://github.com/joan2937/pigpio/issues/589

Fixes:
https://autobuild.buildroot.net/results/09e/09e2213727205674284204ce0604d34b10a5a543/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Cc: Grzegorz Blach <grzegorz@blach.pl>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>

DEVELOPERS

@@ -1357,7 +1357,6 @@ F:	fs/f2fs/
 F:	package/bluez5_utils-headers/
 F:	package/f2fs-tools/
 F:	package/graphicsmagick/
-F:	package/pigpio/
 F:	package/python-aioblescan/
 F:	package/python-bluezero/
 F:	package/python-crontab/