This reverts commit 5343d789.

Reason for revert: breaks roll: https://chromium-review.googlesource.com/c/chromium/src/+/1610023

Original change's description:
> [torque] Add ClassFlag(s) enum
> 
> This removes the need for passing ever more boolean flags
> to the class constructor.
> 
> Change-Id: I0271e1b96585252183dcf070eb440ebdaf2a270f
> Bug: v8:7793
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1607760
> Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
> Reviewed-by: Daniel Clifford <danno@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61444}

TBR=danno@chromium.org,sigurds@chromium.org,tebbi@chromium.org

Change-Id: I38566d8f4203f9cf1e759a3e915cafa86460e6e4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7793
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1609807Reviewed-by: Michael Hablich <hablich@chromium.org>
Commit-Queue: Michael Hablich <hablich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61456}