Remove internals.profiler

Nobody uses this anymore.

R=haraken@chromium.org, tkent@chromium.org
BUG=263316

Review URL: https://codereview.chromium.org/705363003

git-svn-id: svn://svn.chromium.org/blink/trunk@185159 bbb929c8-8fbe-4397-9dbb-9b2b20218538