remove experimental-handlers examples, users should visit github.com/iris-contrib/middleware instead, let's not have duplications

Former-commit-id: 72754683d1bcd4325b5fcd9f57c6cb87f1d7337d

_examples/experimental-handlers/tollboothic/limit-handler/main.go

@@ -1,31 +0,0 @@
-package main
-
-import (
-	"github.com/kataras/iris"
-
-	"github.com/didip/tollbooth"
-	"github.com/iris-contrib/middleware/tollboothic"
-)
-
-// $ go get github.com/didip/tollbooth
-// $ go run main.go
-
-func main() {
-	app := iris.New()
-
-	limiter := tollbooth.NewLimiter(1, nil)
-	//
-	// or create a limiter with expirable token buckets
-	// This setting means:
-	// create a 1 request/second limiter and
-	// every token bucket in it will expire 1 hour after it was initially set.
-	// limiter := tollbooth.NewLimiter(1, &limiter.ExpirableOptions{DefaultExpirationTTL: time.Hour})
-
-	app.Get("/", tollboothic.LimitHandler(limiter), func(ctx iris.Context) {
-		ctx.HTML("<b>Hello, world!</b>")
-	})
-
-	app.Run(iris.Addr(":8080"))
-}
-
-// Read more at: https://github.com/didip/tollbooth