StackExchange hide sorting for a single answer
A userscript that removes the sorting combobox in questions when there is only one answer available.
For users who prefer a cleaner UI when the sorting technically does not make a difference
Deleted answers are not distinguished right now. If a user can see deleted answers, then the total count is taken. Deleted answers are always on the bottom, so for example, with 1 deleted 1 visible answers the total is two, which means the userscript will show the sorting menu but it will still not make sense to sort them.
Install the userscript with: direct link
See the code on GitHub