After the V8 internal stack frame cache was removed in
https://crrev.com/c/1954392, the frames in stack traces will always
have unique frame IDs. This renders the inspector side frame cache
obsolete and this CL removes that cache.

Change-Id: Icb72eec396e96b378ace09bc20fda03b09998c64
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1997127
Auto-Submit: Simon Zünd <szuend@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65721}