linux: Remove CIFS timeout patch

We longer use CIFS in the VM tests so we don't need this anymore.

pkgs/os-specific/linux/kernel/cifs-timeout-2.6.38.patch

@@ -1,13 +0,0 @@
---- /tmp/linux-2.6.32.14/fs/cifs/transport.c	2011-03-27 20:37:20.000000000 +0200
-+++ linux-2.6.32.14/fs/cifs/transport.c	2011-04-01 11:07:17.700305670 +0200
-@@ -182,8 +182,8 @@
- 			   after the retries we will kill the socket and
- 			   reconnect which may clear the network problem.
- 			*/
--			if ((i >= 14) || (!server->noblocksnd && (i > 2))) {
--				cERROR(1, "sends on sock %p stuck for 15 seconds",
-+			if ((i >= 119) || (!server->noblocksnd && (i > 2))) {
-+				cERROR(1, "sends on sock %p stuck for 119 seconds",
- 				    ssocket);
- 				rc = -EAGAIN;
- 				break;

pkgs/os-specific/linux/kernel/patches.nix

@@ -125,14 +125,6 @@ rec {
     features.aufs3 = true;
   };
 
-  # Increase the timeout on CIFS requests from 15 to 120 seconds to
-  # make CIFS more resilient to high load on the CIFS server.
-  cifs_timeout_2_6_38 =
-    { name = "cifs-timeout";
-      patch = ./cifs-timeout-2.6.38.patch;
-      features.cifsTimeout = true;
-    };
-
   no_xsave =
     { name = "no-xsave";
       patch = ./no-xsave.patch;

pkgs/top-level/all-packages.nix

@@ -6380,7 +6380,6 @@ let
     kernelPatches =
       [ kernelPatches.sec_perm_2_6_24
         # kernelPatches.aufs3_2
-        kernelPatches.cifs_timeout_2_6_38
       ];
   };