Remove version from composer.json

Optional if the package repository can infer the version from somewhere, such as the VCS tag name in the VCS repository. In that case it is also recommended to omit it.

https://getcomposer.org/doc/04-schema.md#version

Author: melanger

composer.json

@@ -2,7 +2,6 @@
     "name": "cesnet/simplesamlphp-module-perun",
     "description": "Module which allows SSP to communicate with Perun IAM https://perun.cesnet.cz",
     "type": "simplesamlphp-module",
-    "version": "3.9.0-dev",
     "keywords": ["Perun", "perun", "simplesamlphp"],
     "license": "BSD-2-Clause",
     "authors": [