runtime: Remove unused VMM options for mem alloc

[ms-mahuber]

Merge Checklist

• Followed patch format from upstream recommendation: https://github.com/kata-containers/community/blob/main/CONTRIBUTING.md#patch-format
  • Included a single commit in a given PR - at least unless there are related commits and each makes sense as a change on its own.
• Aware about the PR to be merged using "create a merge commit" rather than "squash and merge" (or similar)
• The upstream/missing label (or upstream/not-needed) has been set on the PR.

Summary

• We only ever tested the fork changes for changed memory allocation behavior with CLH+MSHV
• Remove these options as we don't use QEMU/FC

Test Methodology

N/A