Removed useHTTPS from NodeConfiguration as it's not needed by the node. (#2375)

It's still expected to be present in node.conf if the web server needs to use SSL.

docs/source/example-code/src/main/resources/example-network-map-node.conf

@@ -4,4 +4,3 @@ trustStorePassword : "trustpass"
 p2pAddress : "my-network-map:10000"
 webAddress : "localhost:10001"
 sshdAddress : "localhost:10002"
-useHTTPS : false

docs/source/example-code/src/main/resources/example-node.conf

@@ -10,7 +10,6 @@ dataSourceProperties : {
 p2pAddress : "my-corda-node:10002"
 rpcAddress : "my-corda-node:10003"
 webAddress : "localhost:10004"
-useHTTPS : false
 rpcUsers : [
     { username=user1, password=letmein, permissions=[ StartFlow.net.corda.protocols.CashProtocol ] }
 ]