[O] add binding to org-babel-goto-named-src-block

[Daimrod]

Hi,
many functions in org-babel are bound to a letter X and C-X, it would be
nice if it was the case for org-babel-goto-named-src-block.

Here is a trivial patch.

diff --git a/lisp/ob-keys.el b/lisp/ob-keys.el
index cc11343..759bef3 100644
--- a/lisp/ob-keys.el
+++ b/lisp/ob-keys.el
@@ -60,7 +60,6 @@ functions which are assigned key bindings, and see
     ("u" . org-babel-goto-src-block-head)
     ("\C-u" . org-babel-goto-src-block-head)
     ("g" . org-babel-goto-named-src-block)
-    ("\C-g" . org-babel-goto-named-src-block)
     ("r" . org-babel-goto-named-result)
     ("\C-r" . org-babel-goto-named-result)
     ("\C-b" . org-babel-execute-buffer)