context: remove AnswerWebApp

Author: demget

context.go

@@ -145,10 +145,6 @@ type Context interface {
 	// See Respond from bot.go.
 	Respond(resp ...*CallbackResponse) error
 
-	// AnswerWebApp sends a response to web app query.
-	// See AnswerWebApp from bot.go.
-	AnswerWebApp(result Result) error
-
 	// Get retrieves data from the context.
 	Get(key string) interface{}
 
@@ -458,14 +454,6 @@ func (c *nativeContext) Answer(resp *QueryResponse) error {
 	return c.b.Answer(c.u.Query, resp)
 }
 
-func (c *nativeContext) AnswerWebApp(result Result) error {
-	if c.u.Message == nil || c.u.Message.WebAppData == nil {
-		return errors.New("telebot: context web app is nil")
-	}
-	_, err := c.b.AnswerWebApp(c.u.Query, result)
-	return err
-}
-
 func (c *nativeContext) Set(key string, value interface{}) {
 	c.lock.Lock()
 	defer c.lock.Unlock()