gnu: guile: Default to 2.0.9.

* gnu/packages/guile.scm (guile-2.0/fixed): Switch to `guile-2.0'.

gnu/packages/guile.scm

@@ -164,15 +164,7 @@ call interface, and powerful string processing.")
 (define-public guile-2.0/fixed
   ;; A package of Guile 2.0 that's rarely changed.  It is the one used
   ;; in the `base' module, and thus changing it entails a full rebuild.
-  (package (inherit guile-2.0)
-    (version "2.0.7")
-    (source (origin
-             (method url-fetch)
-             (uri (string-append "mirror://gnu/guile/guile-" version
-                                 ".tar.xz"))
-             (sha256
-              (base32
-               "0f53pxkia4v17n0avwqlcjpy0n89hkazm2xsa6p84lv8k6k8y9vg"))))))
+  guile-2.0)
 
 
 ;;;