removed unneeded imports

Author: fogus

src/main/clojure/clojure/core/async/impl/concurrent.clj

@@ -7,9 +7,8 @@
 ;;   You must not remove this notice, or any other, from this software.
 
 (ns ^{:skip-wiki true}
-    clojure.core.async.impl.concurrent
-  (:import [java.util.concurrent ThreadFactory Executors ExecutorService]
-           [clojure.lang Var]))
+  clojure.core.async.impl.concurrent
+  (:import [java.util.concurrent ThreadFactory]))
 
 (set! *warn-on-reflection* true)