This reverts commit 153c14cb.

Reason for revert: The dependencyStrongerThan logic is incorrect and causing perf regression on ARM.

Original change's description:
> Vulkan: Try to merge barriers if possible
>
> This is try to reduce the number of vkCmdPipelineBarrier API calls into
> driver. It should not affect the actual barriers.
>
> Bug: b/155341891
> Change-Id: I57b8b8cdad50d494c76a008006bd54961170c8bc
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2194841
> Commit-Queue: Charlie Lao <cclao@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

TBR=courtneygo@google.com,timvp@google.com,syoussefi@chromium.org,jmadill@chromium.org,cclao@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: b/155341891
Change-Id: I8ebe7481b299af446dfd488874e64e6e60b4f764

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I8ebe7481b299af446dfd488874e64e6e60b4f764
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2205433
Commit-Queue: Charlie Lao <cclao@google.com>
Reviewed-by: Charlie Lao <cclao@google.com>