Remove third_party/WebKit/LICENSE.

The existing file pointed to the Chromium SVN repository for AUTHORS,
which is out of date. Nowadays Chromium and Blink share one git repo,
so src/LICENSE and src/AUTHORS are in the same repository and apply to
Blink.

Pre-fork license info for WebKit was already found elsewhere (in
LICENSE_FOR_ABOUT_CREDITS and in individual source files).

Review-Url: https://codereview.chromium.org/2123583002
Cr-Commit-Position: refs/heads/master@{#403711}
1 file changed