The devtools frontend used this to set a lower interval (100us). Now the
frontend will stop setting this category and we will always profile
with 100us (which was already the default).

Bug: chromium:1082220

Change-Id: Iaa671d9750ad4c13b95c2c1ba1e433a1077c858a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2198989Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67805}