doc/howto_release.txt: minor update

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73715 15284696-431f-4ddb-bdfa-cd5b030d7da7

doc/howto_release.txt

@@ -134,8 +134,6 @@ echo grass-${VERSION}
 
 mkdir grass-${VERSION}
 mv * grass-${VERSION}/
-# do not include the debian control files:
-mv grass-${VERSION}/debian .
 # create the package:
 tar cvfzh grass-${VERSION}.tar.gz --exclude=.svn grass-${VERSION}/*
 # restore src code location: