removed duplicated line, and clashing license on file (nw)

src/emu/bus/snes/rom21.c

@@ -1,5 +1,4 @@
 // license:GPL-2.0+
-// license:GPL-2.0+
 // copyright-holders:Fabio Priuli, byuu
 /***********************************************************************************************************
 

src/emu/sound/c6280.c

@@ -36,23 +36,6 @@
     - http://www.hudsonsoft.net/ww/about/about.html
     - http://www.hudson.co.jp/corp/eng/coinfo/history.html
 
-    Legal information:
-
-    Copyright Charles MacDonald
-
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Lesser General Public
-    License as published by the Free Software Foundation; either
-    version 2.1 of the License, or (at your option) any later version.
-
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, write to the Free Software
-    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
 #include "emu.h"