Revert "App Plugins: Allow to define experimental pages" (#115841)

Revert "App Plugins: Allow to define experimental pages (#114232)"

This reverts commit e1a2f178e7.

pkg/services/navtree/navtreeimpl/applinks.go

@@ -6,7 +6,6 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/grafana/grafana/pkg/middleware"
 	"github.com/grafana/grafana/pkg/plugins"
 	ac "github.com/grafana/grafana/pkg/services/accesscontrol"
 	contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
@@ -129,10 +128,6 @@ func (s *ServiceImpl) processAppPlugin(plugin pluginstore.Plugin, c *contextmode
 		}
 
 		if include.Type == "page" {
-			if !middleware.PageIsFeatureToggleEnabled(c.Req.Context(), include.Path) {
-				s.log.Debug("Skipping page", "plugin", plugin.ID, "path", include.Path)
-				continue
-			}
 			link := &navtree.NavLink{
 				Text:     include.Name,
 				Icon:     include.Icon,