Remove weird warning

GitHub deprecated and then removed the unencryted git:// protocol
support to access repositories [1].  Using https:// uri for cloning a
public repository without an account like is done by vanagon is the
preferred way today, so we should not warn about it.

1: https://github.blog/security/application-security/improving-git-protocol-security-github/

Author: smortex

lib/vanagon/component/source.rb

@@ -69,10 +69,6 @@ def determine_source_type(uri)
           # URLs that incorrectly respond to git queries
           timeout = 5
           if Vanagon::Component::Source::Git.valid_remote?(uri, timeout)
-            if uri =~ /^http/
-              VanagonLogger.warn "Using http(s) URIs for github is deprecated. " \
-                                 "Use `git:` URI scheme instead."
-            end
             return :git
           end