As part of one of the stack trace refactorings, this field moved from
StackFrameInfo to the StackTraceFrame class, but was not properly
removed.

R=petermarshall@chromium.org

Bug: v8:8742
Change-Id: I18b9bd7650eed0f5bdb0823da9fdefb6afa3491e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1550800Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60659}