Make sure to delete all alexa-remote2 nodes in any flows, also goto config in sidebar and delete any unused nodes there also. You should then be able to remove via the pallete.
My understanding is that the two contribs use the same nodes. So if I delete all alexa-remote2 nodes, this will remove a lot of my configuration.
Perhaps I have misunderstood. If so, how can I find out where all the alexa-remote2 nodes are? And when I show a node which I believe is alexa-remote2 (and not applestrudel), how can I be sure?