Update the instructions on how to do a release.

doc/internal/how_to_release.txt

@@ -28,14 +28,8 @@ It does not have to be in your PYTHONPATH.
 Update the version number
 =========================
 
-Edit ``setup.py`` to contain the newest version number ::
-
-    cd Theano-0.X
-    vi setup.py     # Edit the MAJOR, MINOR, MICRO and SUFFIX
-
 ``Theano/doc/conf.py`` should be updated in the following ways:
 
- * Change the ``version`` and ``release`` variables to new version number.
  * Change the upper copyright year to the current year if necessary.
 
 Update the year in the ``Theano/LICENSE.txt`` file too, if necessary.
@@ -54,7 +48,7 @@ You will need to commit the previous changes, tag the resulting version, and
 push that into the original repository. The syntax is something like the
 following::
 
-    git commit -m "Modifications for 0.X.Y release" setup.py doc/conf.py NEWS.txt HISTORY.txt theano/configdefaults.py doc/library/config.txt
+    git commit -m "Modifications for 0.X.Y release" doc/conf.py NEWS.txt HISTORY.txt theano/configdefaults.py doc/library/config.txt
     git tag -a rel-0.X.Y
     git push
     git push --tags