Move public board overlays to the chromeos repository.

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index f0cefc7414d96ef3b37af62d6ad18bcc62dd9fb0..1063d198387112a76826b1424111bfe572637c11 100644
--- a/DEPS
+++ b/DEPS
@@ -26,7 +26,6 @@ use_relative_urls2=True
 # is trunk/src/DEPS.
 _third_party_base = "src/third_party/"
 _platform_base = "src/platform/"
-_overlays_base = "src/overlays/"
 
 vars = {
   "chromium_revision": "36775",
@@ -135,13 +134,6 @@ deps = {
     # laptop mode tools
     _third_party_base + "laptop-mode-tools": "/laptop-mode-tools.git",
 
-    # board overlays, please keep sorted alphabetically
-    _overlays_base + "overlay-arm-generic":      "/overlay-arm-generic.git",
-    _overlays_base + "overlay-beagleboard":      "/overlay-beagleboard.git",
-    _overlays_base + "overlay-st1q":             "/overlay-st1q.git",
-    _overlays_base + "overlay-tegra2-dev-board": "/overlay-tegra2-dev-board.git",
-    _overlays_base + "overlay-x86-generic":      "/overlay-x86-generic.git",
-
     # ModemManager
     _third_party_base + "modemmanager": "/modemmanager.git",
 }