Delete unused BUILD.gn file in blink/renderer/bindings

Change-Id: Id4be15169850ae2347bd9f6e7bdfbcd12c466383
Reviewed-on: https://chromium-review.googlesource.com/c/1443114
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#627036}
1 file changed