update readme

README.md

@@ -104,8 +104,7 @@ You can make API calls from the REPL using `metabase.http-client`:
     lein ancient                   # list all out-of-date dependencies
     lein ancient latest lein-ring  # list latest version of artifact lein-ring
 
-Will give you a list of out-of-date dependencies. This requires leiningen version 2.4.0 or higher so run `lein upgrade` first if needed.
-This doesn't seem to check plugins, so you'll have to do that manually using `lein ancient latest`.
+Will give you a list of out-of-date dependencies.
 
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