runtime: no build tags for vfs driver

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)

hack/PACKAGERS.md

@@ -160,11 +160,6 @@ export DOCKER_BUILDTAGS='apparmor'
 There are build tags for disabling graphdrivers as well. By default, support
 for all graphdrivers are built in.
 
-To disable vfs
-```bash
-export DOCKER_BUILDTAGS='exclude_graphdriver_vfs'
-```
-
 To disable devicemapper
 ```bash
 export DOCKER_BUILDTAGS='exclude_graphdriver_devicemapper'

runtime/runtime.go

@@ -17,6 +17,7 @@ import (
 	"github.com/dotcloud/docker/runtime/execdriver/lxc"
 	"github.com/dotcloud/docker/runtime/graphdriver"
 	_ "github.com/dotcloud/docker/runtime/graphdriver/btrfs"
+	_ "github.com/dotcloud/docker/runtime/graphdriver/vfs"
 	_ "github.com/dotcloud/docker/runtime/networkdriver/lxc"
 	"github.com/dotcloud/docker/runtime/networkdriver/portallocator"
 	"github.com/dotcloud/docker/utils"

runtime/runtime_vfs.go

@@ -1,7 +0,0 @@
-// +build !exclude_graphdriver_vfs
-
-package runtime
-
-import (
-	_ "github.com/dotcloud/docker/runtime/graphdriver/vfs"
-)