These are no longer needed now that JS builtins have been fully
removed.

The internal match usage in assert.js has been replaced by a custom
miniparser. The internal replace use in various string builtins was
replaced by manual global string replacement in a runtime function.

Bug: v8:8842,v8:7624
Change-Id: Ieb49c694662a13e84fd9fd2fe5d0412b8e0574da
Reviewed-on: https://chromium-review.googlesource.com/c/1473030Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Peter Wong <peter.wm.wong@gmail.com>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59689}