Remove keyserver list
Remove keyserver list

The pgpverify plugin complains about the hkp:// SKS keyservers URL.

Since the plugin's default list of keyservers is the same, just using
HTTPS rather than hkp/hkps, remove the explicit list and fall back to
the default.

dropwizard/dropwizard,dropwizard/dropwizard,dropwizard/dropwizard