Revert of Add support for installing ARM64 sysroot (patchset #1 id:1 of https://codereview.chromium.org/2078293002/ )

Reason for revert:
https://bugs.chromium.org/p/chromium/issues/detail?id=626784

Original issue's description:
> Add support for installing ARM64 sysroot
>
> This change modifies install-sysroot.py to add support for
> installing ARM64 sysroot. Also update the jessie arm64 package list.
>
> BUG=613452
>
> Committed: https://crrev.com/ad891a49ee7aeff1a42559c0a059cb51f053e1fb
> Cr-Commit-Position: refs/heads/master@{#404323}

TBR=thestig@chromium.org,mmoss@chromium.org,thakis@chromium.org,apatole@nvidia.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=613452

Review-Url: https://codereview.chromium.org/2132153002
Cr-Commit-Position: refs/heads/master@{#404490}
2 files changed