Removed mount code from container. It belongs in graph

Upstream-commit: 6f6eaca861fec53a6d21d420b813041dc93e8b93
Component: engine

components/engine/mount_darwin.go

@@ -1,7 +0,0 @@
-package docker
-
-import "errors"
-
-func mount(source string, target string, fstype string, flags uintptr, data string) (err error) {
-	return errors.New("mount is not implemented on darwin")
-}

components/engine/mount_linux.go

@@ -1,7 +0,0 @@
-package docker
-
-import "syscall"
-
-func mount(source string, target string, fstype string, flags uintptr, data string) (err error) {
-	return syscall.Mount(source, target, fstype, flags, data)
-}