Remove an exported method that shouldn't be needed

window.go

@@ -43,15 +43,3 @@ type Window interface {
 	// Canvas returns the canvas context to render in the window
 	Canvas() Canvas
 }
-
-// GetWindow returns the window containing the passed Canvas.
-// It will return nil if the Canvas is not associated with any existing windows.
-func GetWindow(c Canvas) Window {
-	for _, window := range GetDriver().AllWindows() {
-		if window.Canvas() != nil && window.Canvas() == c {
-			return window
-		}
-	}
-
-	return nil
-}