Rollback memory changes

[xgreenx]

[Link to related issue(s) here, if any]

[Short description of the changes.]

Checklist

• [ ] Breaking changes are clearly marked as such in the PR description and changelog
• [ ] New behavior is reflected in tests
• [ ] If performance characteristic of an instruction change, update gas costs as well or make a follow-up PR for that
• [ ] The specification matches the implemented behavior (link update PR if changes are needed)

Before requesting review

• [ ] I have reviewed the code myself
• [ ] I have created follow-up issues caused by this PR and linked them here

After merging, notify other teams

[Add or remove entries as needed]

• [ ] Rust SDK
• [ ] Sway compiler
• [ ] Platform documentation (for out-of-organization contributors, the person merging the PR will do this)
• [ ] Someone else?