removing two currently unused export variables

* lisp/ob-exp.el: We may no longer need to export names along with
  code blocks.

lisp/ob-exp.el

@@ -54,28 +54,6 @@ process."
   :type 'boolean)
 (put 'org-export-babel-evaluate 'safe-local-variable (lambda (x) (eq x nil)))
 
-(defvar org-babel-function-def-export-keyword "function"
-  "The keyword to substitute for the source name line on export.
-When exporting a source block function, this keyword will
-appear in the exported version in the place of source name
-line. A source block is considered to be a source block function
-if the source name is present and is followed by a parenthesized
-argument list. The parentheses may be empty or contain
-whitespace. An example is the following which generates n random
-\(uniform) numbers.
-
-#+source: rand(n)
-#+begin_src R
-  runif(n)
-#+end_src")
-
-(defvar org-babel-function-def-export-indent 4
-  "Number of characters to indent a source block on export.
-When exporting a source block function, the block contents will
-be indented by this many characters. See
-`org-babel-function-def-export-name' for the definition of a
-source block function.")
-
 (defmacro org-babel-exp-in-export-file (lang &rest body)
   (declare (indent 1))
   `(let* ((lang-headers (intern (concat "org-babel-default-header-args:" ,lang)))