Drop unused dependencies dir (#20482)

* Drop unused dependencies dir

* Get rid of deps_upgrade.py

scripts/deps_upgrade.py

@@ -1,13 +0,0 @@
-# Copyright (c) HashiCorp, Inc.
-# SPDX-License-Identifier: BUSL-1.1
-
-import os
-import sys
-
-filename = sys.argv[1]
-with open(filename) as f:
-    content = f.readlines()
-    for l in content:
-        name = l.split()[0]
-        print(name)
-        os.system("go get " + name + "@latest")