Delete unused cache of CodeCacheManager from PersistentInfo

[0xdaryl]

The only reference was in DebugExt, but its value was always NULL.

Signed-off-by: Daryl Maier maier@ca.ibm.com

[0xdaryl]

Note to reviewers:

This PR is to remove a CodeCacheManager dependence in PersistentInfo. Its only use is this debug extension, and it is always NULL, hence the affected function has not been doing anything useful since it couldn't get a CodeCacheManager.

The right fix for this is to use the codeCacheManager that is cached in the private JITConfig struct (available from javaVM->jitConfig->privateConfig->codeCacheManager like kca uses). However, the privateConfig will have to be materialized from the remote VM. It wasn't done when the local VM was materialized in dbgext/j9dbgext.c presumably because it doesn't have access to the TR_JitPrivateConfig struct. Materializing this in the JIT debug extension requires the remote VM which is not presently available.

Fixing this properly is far more work with questionable benefit (no real consumers of the debug extensions). Hence, I will leave this unimplemented with a comment in the code. The functionality after this PR is no different than what currently exists (i.e., none).

[0xdaryl]

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