Port a42473ab

Original Commit Message:

    These are no longer being used.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, bjaideep@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:6408
LOG=N

Review-Url: https://codereview.chromium.org/2949103005
Cr-Commit-Position: refs/heads/master@{#46192}