Revert "fix: implement ArrayBuffer Realloc (#625)"

[codebytere]

Description of Change

This reverts commit 5fe4b309eabf609bcecc5f5b184989cd4a895066.

In the latest Node upgrade to v10.6.0, we initially believed we had no other choice than to implement ArrayBuffer::Allocator::Realloc, but this commit determined a way to avoid this externality. This commit thus reverts the implementation.

Checklist

• [x] PR description included and stakeholders cc'd
• [x] Patch information is added to appropriate .patches.yaml
• [x] script/update runs without error
• [x] PR title follows semantic commit guidelines