TUN-2243: Revert "STOR-519: Add db-connect, a SQL over HTTPS server"

This reverts commit 5da2109811.

vendor/google.golang.org/appengine/internal/identity_flex.go

@@ -1,11 +0,0 @@
-// Copyright 2018 Google LLC. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-// +build appenginevm
-
-package internal
-
-func init() {
-	appengineFlex = true
-}