Removing beans.xml from idm/api and idm/simple-schema

The idm/api and idm/simple-schema contains beans.xml inside them even if it doesn't seem to be needed as those modules are not using cdi or weld.

There are some issues with beans.xml inside those jar files as when they are inside the WAR, the war is automatically processed by Weld listener during deploy, which is causing us some issues in keycloak.