AboutSystem: Drop GLU credit.

We use Mesa3d GLU now, which is under MIT license.

data/system/data/licenses/SGI Free B

@@ -1,29 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */

src/apps/aboutsystem/AboutSystem.cpp

@@ -1850,12 +1850,6 @@ AboutView::_CreateCreditsView()
 		.SetLicense("MIT")
 		.SetURL("https://www.mesa3d.org"));
 
-	// SGI's GLU implementation copyrights
-	_AddPackageCredit(PackageCredit("GLU")
-		.SetCopyright(B_TRANSLATE(COPYRIGHT_STRING "1991-2000 "
-			"Silicon Graphics, Inc. All rights reserved."))
-		.SetLicense("SGI Free B"));
-
 	// GLUT implementation copyrights
 	_AddPackageCredit(PackageCredit("GLUT")
 		.SetCopyrights(B_TRANSLATE(COPYRIGHT_STRING "1994-1997 Mark Kilgard. "