Calculate reading time during feed processing

The goal is to speed up the user interface.

Detecting the language based on the content is pretty slow.

template/engine.go

@@ -65,9 +65,6 @@ func (e *Engine) Render(name, language string, data interface{}) []byte {
 		"plural": func(key string, n int, args ...interface{}) string {
 			return printer.Plural(key, n, args...)
 		},
-		"timeToRead": func(content string) int {
-			return timeToRead(content)
-		},
 	})
 
 	var b bytes.Buffer