DISALLOW_COPY_AND_ASSIGN is no longer in our codebase, and the compilers
mentioned in the comments are (probably) no longer supported.

Bug: v8:12244
Change-Id: I432bd56ca3ddd870be140032f11d94ddb60ce1a9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3171974Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76977}