treewide: remove FSF address

Remove the paragraph about writing to the Free Software Foundation's
mailing address. The FSF has changed addresses in the past, and may do
so again. In 2021 this is not useful, let's rather have a bit less
boilerplate at the start of source files.

Change-Id: Ic8c69d24141abd183e3b1257f4e9edfd9c1afabe

include/ipa.hrl

@@ -11,10 +11,6 @@
 % but WITHOUT ANY WARRANTY; without even the implied warranty of
 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 % GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License along
-% with this program; if not, write to the Free Software Foundation, Inc.,
-% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 -ifndef(IPA).
 -define(IPA, true).

src/ipa_proto.erl

@@ -14,10 +14,6 @@
 % but WITHOUT ANY WARRANTY; without even the implied warranty of
 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 % GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License along
-% with this program; if not, write to the Free Software Foundation, Inc.,
-% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 -module(ipa_proto).
 -author('Harald Welte <laforge@gnumonks.org>').

src/ipa_proto_ccm.erl

@@ -13,10 +13,6 @@
 % but WITHOUT ANY WARRANTY; without even the implied warranty of
 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 % GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License along
-% with this program; if not, write to the Free Software Foundation, Inc.,
-% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 -module(ipa_proto_ccm).
 -author('Harald Welte <laforge@gnumonks.org>').