Removing opentracing (#29965)

* Removing opentracing

* Fixing CI

server/Makefile

@@ -304,11 +304,6 @@ ifeq ($(BUILD_ENTERPRISE_READY),true)
   endif
 endif
 
-app-layers: ## Extract interface from App struct
-	$(GO) install github.com/reflog/struct2interface@v0.6.1
-	$(GOBIN)/struct2interface -f "channels/app" -o "channels/app/app_iface.go" -p "app" -s "App" -i "AppIface" -t ./channels/app/layer_generators/app_iface.go.tmpl
-	$(GO) run ./channels/app/layer_generators -in ./channels/app/app_iface.go -out ./channels/app/opentracing/opentracing_layer.go -template ./channels/app/layer_generators/opentracing_layer.go.tmpl
-
 i18n-extract: ## Extract strings for translation from the source code
 	cd ../tools/mmgotool && $(GO) install .
 	$(GOBIN)/mmgotool i18n extract --portal-dir=""