Update docs

Author: r0man

doc/modules/ROOT/pages/usage/misc_features.adoc

@@ -336,12 +336,6 @@ Cider supports the whole mix, but with a twist.
   data for it, the operation is tried against all registries, from
   newest to oldest, with the first successful operation winning.
 
-This is not the best strategy to support multiple versions of Clojure
-Spec at the same time, but a practical one. We traded the benefit of
-working with `spec-alpha` and `spec-alpha-2` at the same time against
-the amount of work required to implement proper version support in the
-UI and middleware.
-
 == Formatting Code with cljfmt
 
 While CIDER has it's own code formatting (indentation) engine, you can also