backups_nonlinux.go import error

The win and osx builds fail uniformly as of commit 8864910. They last passed on master 46366b6

Command '['go', 'install', 'github.com/juju/juju/cmd/jujud']' returned non-zero exit status 2
# github.com/juju/juju/state/backups
/tmp/tmpN9Wkgw/juju-core_1.23-alpha1/src/github.com/juju/juju/state/backups/backups_nonlinux.go:11: imported and not used: "github.com/juju/juju/apiserver/params"

The suspects are
Commit 3769dfd Merge pull request #1574 from mattyw/todo-cleanup …
Commit 8b0a9a9 Merge pull request #1560 from dimitern/lp-1418433-restore-megawatcher… …
Commit a5e0141 Merge pull request #1569 from binary132/cli-action-cleanup-outputs …
Commit 8864910 Merge pull request #1411 from perrito666/restore_04_restore_api_endpoint …