To prepare the platform for the removal of the Security Manager, the m-let feature has been removed. This removal has no impact on the JMX agent used for local and remote monitoring, the built-in instrumentation of the Java virtual machine, or tooling that uses JMX.
The API classes that have been removed are:
- `javax.management.loading.MLet`
- `javax.management.loading.MLetContent`
- `javax.management.loading.PrivateMLet`
- `javax.management.loading.MLetMBean`