Removes echoed information from make doc (issue 6496074)

[PhilEHolmes]

Reviewers: John Mandereau,

Message:
Please check.

Description:
I've tested this with a full make, make doc, make test and diffed the
files created with make doc - all is exactly the same.  Think this
should be good to go, but just want confirmation.

Please review this at http://codereview.appspot.com/6496074/

Affected files:
  M Documentation/GNUmakefile


Index: Documentation/GNUmakefile
diff --git a/Documentation/GNUmakefile b/Documentation/GNUmakefile
index  
aafcb0bc65455f61c1e9be7135a25de85c35c8d0..a3ef4bb6e7c6640249ed9244139374a09a5a2de1  
100644
--- a/Documentation/GNUmakefile
+++ b/Documentation/GNUmakefile
@@ -167,8 +167,6 @@ extra-local-help:
        @echo

 info: $(INFO_FILES)
-       @echo export LILYPOND_DATADIR=$(LILYPOND_DATADIR)
-       @echo export PYTHONPATH=$(PYTHONPATH)

 xml: $(outdir)/notation/notation.xml $(outdir)/internals/internals.xml