Chore: replace macaron with web package (#40136)

* replace macaron with web package

* add web.go

pkg/api/avatar/avatar.go

@@ -23,8 +23,7 @@ import (
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/setting"
-	"gopkg.in/macaron.v1"
-
+	"github.com/grafana/grafana/pkg/web"
 	gocache "github.com/patrickmn/go-cache"
 )
 
@@ -78,7 +77,7 @@ type CacheServer struct {
 var validMD5 = regexp.MustCompile("^[a-fA-F0-9]{32}$")
 
 func (a *CacheServer) Handler(ctx *models.ReqContext) {
-	hash := macaron.Params(ctx.Req)[":hash"]
+	hash := web.Params(ctx.Req)[":hash"]
 
 	if len(hash) != 32 || !validMD5.MatchString(hash) {
 		ctx.JsonApiErr(404, "Avatar not found", nil)