Cleanup go.mod

Author: ajanikow

go.mod

@@ -28,7 +28,6 @@ require (
 	github.com/arangodb/go-driver v1.2.1
 	github.com/arangodb/go-driver/v2 v2.0.0-20211021031401-d92dcd5a4c83
 	github.com/arangodb/go-upgrade-rules v0.0.0-20180809110947-031b4774ff21
-	github.com/arangodb/rebalancer v0.1.1
 	github.com/cenkalti/backoff v2.2.1+incompatible
 	github.com/dchest/uniuri v0.0.0-20160212164326-8902c56451e9
 	github.com/ghodss/yaml v1.0.0