diff --git a/filter/filter.go b/filter/filter.go
index 22672fed..05047e66 100644
--- a/filter/filter.go
+++ b/filter/filter.go
@@ -34,12 +34,6 @@ import (
 	"gocv.io/x/gocv"
 )
 
-// Filter is an interface shared by all filters. It is the same as an io.WriteCloser
-// interface, however more functions may be added as needed.
-type Filter interface {
-	io.WriteCloser
-}
-
 // MogFilter is a filter that provides basic motion detection.
 type MogFilter struct {
 	dst     io.WriteCloser