Package jdk.internal.java.lang.constant containing ModuleDesc and PackageDesc become obsolete after JDK-8306729.
All references to ModuleDesc and PackageDesc classes in jdk.internal.classfile.java.lang.constant package should be replaced with references to the relevant classes in java.lang.constant package (across all JDK sources, tests and JMH benchmarks).
The package export hooks should be removed from java.base module-info, make files and test headers.
The package should be deleted.