composer remove clue/block-react

The package has been abandoned and migrated to `reac/async`, which was
introduced as a new dependency in f45b268.

Co-authored-by: Eric Lippmann <eric.lippmann@icinga.com>

Author: Al2Klimov

composer.json

@@ -7,7 +7,6 @@
     "require": {
         "php": ">=8.2",
         "ext-curl": "*",
-        "clue/block-react": "^1.5",
         "clue/connection-manager-extra": "^1.3",
         "clue/http-proxy-react": "^1.9",
         "clue/mq-react": "^1.7",