Prerender: Remove third_party/blink/public/common/prerender/

third_party/blink/public/common/prerender/ contains only the OWNERS file
after https://crrev.com/c/2409890.

Bug: 755921
Change-Id: I51f1ec7e0c397592989cc60c581c69eae8ebf484
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2512487
Commit-Queue: Kinuko Yasuda <kinuko@chromium.org>
Auto-Submit: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823064}

third_party/blink/public/common/prerender/OWNERS

-file://chrome/browser/prerender/OWNERS
-
-# COMPONENT: Internals>Preload