Remove recipes.py and friends from chromium/src (for now).

Until we have a better testing/rolling strategy, we're removing recipes from
chromium/src.

[email protected], [email protected]
BUG=chromium:584079

Review-Url: https://codereview.chromium.org/2585583007
Cr-Commit-Position: refs/heads/master@{#442172}

Author: riannucci

infra/PRESUBMIT.py

@@ -1,5 +1 @@
 This directory contains chrome-infra-specific files.
-
-This directory also contains some recipes, but don't get too excited, we're
-still getting support ready; for the time being chromium recipes should still
-live in tools/build.