Revert "Enable mold linker for non-official x64 Android builds"

This reverts commit af7cc65836b65ac0565d24215097bf84d3075cf7.

Reason for revert: Sometimes breaks with siso sometimes (see bug)

Original change's description:
> Enable mold linker for non-official x64 Android builds
>
> Bug: 40208899
> Change-Id: I40db9ef2d6818131a4d8369e89498630901fedde
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7808587
> Commit-Queue: Andrew Grieve <agrieve@chromium.org>
> Auto-Submit: Andrew Grieve <agrieve@chromium.org>
> Reviewed-by: Peter Wen <wnwen@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1623804}

Bug: 40208899, 509543574
Change-Id: Ib3ac1a455f6b35298016372d03047de869b688d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7821682
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Sam Maier <smaier@google.com>
Reviewed-by: Sam Maier <smaier@google.com>
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1626317}
NOKEYCHECK=True
GitOrigin-RevId: 0fbb327d50befd5cc6435bc3c3461d971aff214c