libnetwork: remove unused ErrNoContainer

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/error.go

@@ -25,17 +25,6 @@ func (nse ErrNoSuchEndpoint) Error() string {
 // NotFound denotes the type of this error
 func (nse ErrNoSuchEndpoint) NotFound() {}
 
-// ErrNoContainer is returned when the endpoint has no container
-// attached to it.
-type ErrNoContainer struct{}
-
-func (nc ErrNoContainer) Error() string {
-	return "no container is attached to the endpoint"
-}
-
-// Maskable denotes the type of this error
-func (nc ErrNoContainer) Maskable() {}
-
 // ErrInvalidID is returned when a query-by-id method is being invoked
 // with an empty id parameter
 type ErrInvalidID string

libnetwork/errors_test.go

@@ -16,7 +16,7 @@ func TestErrorInterfaces(t *testing.T) {
 		}
 	}
 
-	maskableErrorList := []error{ErrNoContainer{}}
+	maskableErrorList := []error{ManagerRedirectError("")}
 	for _, err := range maskableErrorList {
 		switch u := err.(type) {
 		case types.MaskableError: