Don't need to explicitly include clojars classic in project.clj.

leiningen-core/project.clj

@@ -10,7 +10,6 @@
                  [robert/hooke "1.3.0"]
                  [com.cemerick/pomegranate "0.0.13"
                   :exclusions [org.slf4j/slf4j-api]]]
-  :repositories [["classic" "https://clojars.org/repo/"]]
   :scm {:dir ".."}
   ;; This is only used when releasing Leiningen. Can't put it in a
   ;; profile since it must be installed using lein1

project.clj

@@ -17,7 +17,6 @@
                  [reply "0.1.4" :exclusions [ring/ring-core]]
                  ;; drawbridge specifies an ancient version here, so bump it
                  [clj-http "0.5.8" :exclusions [crouton cheshire]]]
-  :repositories [["classic" "https://clojars.org/repo/"]]
   ;; checkout-deps don't work with :eval-in :leiningen
   :profiles {:dev {:resource-paths ["leiningen-core/dev-resources"]
                    :test-paths ["leiningen-core/test"]}