This reverts commit 75d19b5b.

Reason for revert: Breaking Mac: https://build.chromium.org/p/client.v8.fyi/builders/Mac%20V8%20FYI%20Release%20%28Intel%29/builds/290

Original change's description:
> Reland "[builtins] Embed builtins into the binary"
> 
> This is a reland of 491d5a81
> 
> Original change's description:
> > [builtins] Embed builtins into the binary
> >
> > This embeds code for off-heap-safe builtins into the binary. Actual
> > execution of embedded code is not implemented yet.
> >
> > The embedded file has the following format:
> >
> > namespace v8 {
> > namespace internal {
> >
> > namespace {
> >
> > V8_EMBEDDED_TEXT_HEADER(v8_embedded_blob_)
> > __asm__( /* builtin offsets and lengths */ );
> > __asm__(V8_ASM_LABEL("Builtins_RecordWrite"));
> > __asm__( /* binary instruction stream */ );
> > /* Repeat for other builtins. */
> >
> > extern "C" const uint8_t v8_embedded_blob_[];
> > static const uint32_t v8_embedded_blob_size_ = /* size in bytes */;
> >
> > }  // namespace
> >
> > const uint8_t* DefaultEmbeddedBlob() { return v8_embedded_blob_; }
> > uint32_t DefaultEmbeddedBlobSize() { return v8_embedded_blob_size_; }
> >
> > }  // namespace internal
> > }  // namespace v8
> >
> > Bug: v8:6666
> > Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.v8.try:v8_linux64_fyi_rel_ng
> > Change-Id: Ic989f01da69ebe2863f31d934bfbe2c5d6e80864
> > Reviewed-on: https://chromium-review.googlesource.com/946011
> > Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> > Reviewed-by: Yang Guo <yangguo@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#51759}
> 
> TBR=yangguo@chromium.org
> 
> Bug: v8:6666
> Change-Id: Iba245976ce46c62474dcba94a99ab4a217b2e20e
> Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.v8.try:v8_linux64_fyi_rel_ng
> Reviewed-on: https://chromium-review.googlesource.com/950983
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#51769}

TBR=yangguo@chromium.org,jgruber@chromium.org

Change-Id: If2560e5ea57585421ba5c3da35717abb9b31766f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6666
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.v8.try:v8_linux64_fyi_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/951562Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51772}