Remove bindings from remote example

The example `RemoteGraphApp` that shows how to connect to JanusGraph Server via remote uses bindings [and explains](https://github.com/JanusGraph/janusgraph/blob/master/janusgraph-examples/example-remotegraph/src/main/java/org/janusgraph/example/RemoteGraphApp.java#L87) that they should be used so traversals can be cached on the server. This is no longer true for ByteCode based requests like they are used here.
So, we should remove the bindings from the example completely.

This came up [on the janusgraph-users list](https://groups.google.com/d/msg/janusgraph-users/T7wg_dKri1g/LfOrIXZbAgAJ).

Start in janusgraph-examples/example-remotegraph/src/main/java/org/janusgraph/example/RemoteGraphApp.java, especially the binding-related section around line 87. Remove the bindings and their outdated explanation, then verify that the remote example no longer uses bindings.

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