ExceptionInInitializerError if jars executed with java -jar

Main-Class set in manifests of target/clojure.jar (or jars in Maven repository) gives impression, that they can be run as standalone JAR-packaged applications.

However running them with

results in

(It of course works perfectly fine for clojure.jar built in local profile with dependencies shaded.)

Proposed: Remove main class for Clojure jar in Maven, retain it for local jar build (which includes spec jars).

Patch: clj-2459-1.patch

Screened by: Alex Miller - correctly builds normal Clojure without a main class, but continues to build local jar with a main (that one includes the spec deps).