Remove dead code for inline string hashing.

This has become obsolete since hydrogenized StringAdd.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/544613002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23689 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Disable slow type tests for now.

R=mstarzinger@chromium.org, neis@chromium.org
BUG=

Review URL: https://codereview.chromium.org/545453002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23690 ce2b1a6d-e550-0410-aec6-3dcde31c8c00