Ensures SSRF requests are not allowed by include directive

'allow_local_requests' argument was removed from File::Remote in the external module.

Related to https://gitlab.com/gitlab-org/gitlab-ee/issues/6002

ee/changelogs/unreleased/security-include-directive-allows-ssrf-requests.yml

+---
+title: Fixes include directive to not allow SSRF requests
+merge_request:
+author:
+type: security

ee/lib/gitlab/ci/external/file/remote.rb

@@ -11,7 +11,7 @@ module Gitlab
 
             @content = strong_memoize(:content) do
               begin
-                Gitlab::HTTP.get(location, allow_local_requests: true)
+                Gitlab::HTTP.get(location)
               rescue Gitlab::HTTP::Error, Timeout::Error, SocketError
                 nil
               end