Remove DEPS that was removed from chromium

https://crrev.com/c/2950009 removed third_party/turbine/src from DEPS. We should manually remove it to unblock chromium -> webrtc roll (https://ci.chromium.org/ui/p/webrtc/builders/cron/Auto-roll%20-%20WebRTC%20DEPS/14975/overview)

Bug: None
Change-Id: I60a47275983dc46a01d7c882daf5a890bc125571
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/221981
Commit-Queue: Andrey Logvin <landrey@webrtc.org>
Reviewed-by: Christoffer Jansson <jansson@google.com>
Cr-Commit-Position: refs/heads/master@{#34267}
diff --git a/DEPS b/DEPS
index caca5ff..7a3ea2e 100644
--- a/DEPS
+++ b/DEPS
@@ -467,11 +467,6 @@
       'dep_type': 'cipd',
   },
 
-  'src/third_party/turbine/src': {
-      'url': 'https://chromium.googlesource.com/external/github.com/google/turbine.git' + '@' + '3c31e67ae25b5e43713fd868e3a9b535ff6298af',
-      'condition': 'checkout_android',
-  },
-
   'src/tools/luci-go': {
       'packages': [
         {