remove now unused patch

recipes/rust/files/0001-src-etc-snapshot-support-triples-lacking-a-vendor.patch

@@ -1,29 +0,0 @@
-From 7200c63876da23634fea0c0987e4f955ebd08baf Mon Sep 17 00:00:00 2001
-From: Cody P Schafer <dev@codyps.com>
-Date: Thu, 13 Nov 2014 17:14:46 -0500
-Subject: [PATCH] src/etc/snapshot: support triples lacking a vendor
-
----
- src/etc/snapshot.py | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
-
-diff --git a/src/etc/snapshot.py b/src/etc/snapshot.py
-index e0610bf..85798da 100644
---- a/src/etc/snapshot.py
-+++ b/src/etc/snapshot.py
-@@ -75,7 +75,11 @@ def full_snapshot_name(date, rev, platform, hsh):
- 
- 
- def get_kernel(triple):
--    os_name = triple.split('-')[2]
-+    t=triple.split('-')
-+    if len(t) == 2:
-+      os_name = triple.split('-')[1]
-+    else:
-+      os_name = triple.split('-')[2]
-     if os_name == "windows":
-         return "winnt"
-     if os_name == "darwin":
--- 
-2.1.3
-