Remove VerifiedHTTPSConnection class
Remove VerifiedHTTPSConnection class

It was needed for now EOL python versions, was unused for quite
a while and is insecure (does not allow customising TLS version
for example).

Change-Id: Ia382d3fc155196e7cf916f57ee0ac6be7dde07af

openstack/python-ironicclient,openstack/python-ironicclient