package/php-zmq: remove package

Building php-zmq is broken with php 8.5.

Although some pull requests exist upstream to fix php 8.5 support:
https://github.com/zeromq/php-zmq/pulls

they do not fix other bugs like broken build with gcc 15.x which was the
cause for the its removal by Debian:
https://tracker.debian.org/news/1668817/php-zmq-removed-from-testing/
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1097580

According to various sources the package is unmaintained:
https://pecl.php.net/package/zmq
https://lists.zeromq.org/pipermail/zeromq-dev/2019-August/033109.html
https://github.com/zeromq/php-zmq/pull/240#issuecomment-3684566367

so we drop the package from buildroot.

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>

Config.in.legacy

@@ -146,6 +146,13 @@ endif
 
 comment "Legacy options removed in 2026.02"
 
+config BR2_PACKAGE_PHP_ZMQ
+	bool "php-zmq removed"
+	select BR2_LEGACY
+	help
+	  php-zmq was no longer maintained upstream, broken with php
+	  8.5, so it has been dropped.
+
 config BR2_PACKAGE_LOCKDEV
 	bool "lockdev removed"
 	select BR2_LEGACY