Revert "guix: diagnostics: Export 'info' as replacement."

This reverts commit 6c6139bce0: this change
worked “by chance” since no Guile 3.0.x release provides an ‘info’ binding to
replace.  See <https://codeberg.org/guix/guix/pulls/4074#issuecomment-8289707>.

Change-Id: Icadc7fcf337ca1ff3b3d3af5a66b47e8cd2f61b2

guix/diagnostics.scm

@@ -25,8 +25,8 @@
   #:use-module (srfi srfi-35)
   #:use-module (ice-9 format)
   #:use-module (ice-9 match)
-  #:replace (info)
   #:export (warning
+            info
             report-error
             leave