Revert "Ship promises and weak collections"

Reason: breaks Blink layout tests.

R=machenbach@chromium.org
BUG=

Review URL: https://codereview.chromium.org/210853003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20233 ce2b1a6d-e550-0410-aec6-3dcde31c8c00