ob-clojure.el: Remove nrepl.el support

* ob-clojure.el (org-babel-clojure-backend)
(org-babel-execute:clojure): Remove nrepl.el support.

lisp/ob-clojure.el

@@ -24,33 +24,26 @@
 
 ;;; Commentary:
 
-;; Support for evaluating clojure code, relies either on Slime or
-;; on Nrepl.el for all eval.
+;; Support for evaluating clojure code
 
 ;; Requirements:
 
 ;; - clojure (at least 1.2.0)
 ;; - clojure-mode
-;; - either cider or nrepl.el or SLIME
+;; - either cider or SLIME
 
-;; For cider, see https://github.com/clojure-emacs/cider
+;; For Cider, see https://github.com/clojure-emacs/cider
 
 ;; For SLIME, the best way to install these components is by following
 ;; the directions as set out by Phil Hagelberg (Technomancy) on the
 ;; web page: http://technomancy.us/126
 
-;; For nREPL:
-;; get clojure with https://github.com/technomancy/leiningen
-;; get nrepl from MELPA (clojure-mode is a dependency).
-
 ;;; Code:
 (require 'ob)
 (eval-when-compile
   (require 'cl))
 
 (declare-function nrepl-send-string-sync "ext:nrepl-client" (input &optional ns session))
-(declare-function nrepl-current-connection-buffer "ext:nrepl" ())
-(declare-function nrepl-eval "ext:nrepl" (body))
 (declare-function slime-eval "ext:slime" (sexp &optional package))
 
 (defvar org-babel-tangle-lang-exts)
@@ -61,13 +54,11 @@
 
 (defcustom org-babel-clojure-backend
   (cond ((featurep 'cider) 'cider)
-	((featurep 'nrepl) 'nrepl)
 	(t 'slime))
   "Backend used to evaluate Clojure code blocks."
   :group 'org-babel
   :type '(choice
 	  (const :tag "cider" cider)
-	  (const :tag "nrepl" nrepl)
 	  (const :tag "SLIME" slime)))
 
 (defun org-babel-expand-body:clojure (body params)
@@ -104,15 +95,6 @@
 			(member "pp" result-params))
 		    :stdout
 		  :value)))))
-      (nrepl
-       (require 'nrepl)
-       (setq result
-	     (if (nrepl-current-connection-buffer)
-		 (let* ((result (nrepl-eval expanded))
-			(s (plist-get result :stdout))
-			(r (plist-get result :value)))
-		   (if s (concat s "\n" r) r))
-	       (error "nREPL not connected!  Use M-x nrepl-jack-in RET"))))
       (slime
        (require 'slime)
        (with-temp-buffer