a601845780
This commit removes references to JMX from the docs. Context: The JMX server has been dropped and removed from installation. The user can install it manually if needed, as documented with https://github.com/scylladb/scylladb/issues/18687. This commit removes the outdated information about JMX from other pages in the documentation, including the docs for nodetool, the list of ports, and the admin section. Also, the no longer relevant JMX information is removed from the Docker Hub docs. Fixes https://github.com/scylladb/scylladb/issues/18687 Fixes https://github.com/scylladb/scylladb/issues/19575 Closes scylladb/scylladb#20917
