Revert "[vm] Add linker script to hide symbols from standalone embedder executables"

This reverts commit 78435da54ba37c2ef49fcc43c5fef647b073fac8.

Reason for revert: The mac builds failed due to clang not understanding the linker option on Mac. Will also investigate Ryan's question around interaction with profiler.

Original change's description:
> [vm] Add linker script to hide symbols from standalone embedder executables
> 
> This is a safeguard to prevent users from depending on standalone
> executable internal symbols.
> 
> This was already done in g3 in cl/304142297 for b/151696305.
> 
> Change-Id: Ie01fc662eba7f8873530721394821b6c6c85e510
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142023
> Commit-Queue: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>

TBR=vegorov@google.com,kustermann@google.com

Change-Id: I824fa99658612856df6cecc1533a1ea7ee87c54e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142024
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>