Remove redundant condition from src/xutf8/ucs2fontmap.c (#1549)

src/xutf8/ucs2fontmap.c

@@ -1,6 +1,7 @@
 /*
  * Author: Jean-Marc Lienher ( http://oksid.ch )
  * Copyright 2000-2003 by O'ksi'D.
+ * Copyright 2026 by Bill Spitzak and others.
  *
  * This library is free software. Distribution and use rights are outlined in
  * the file "COPYING" which should have been included with this file.  If this
@@ -13,6 +14,11 @@
  *     https://www.fltk.org/bugs.php
  */
 
+/* Note: This file - or parts of it - must have been generated by a program
+ *       at some time in the past, see src/xutf8/utils/conv_gen.c .
+ *       However, it has been significantly edited since then.
+ *       Albrecht-S, Aug 9, 2026. See GitHub Issue #1549.
+*/
 #include <stdlib.h>
 #include <string.h>
 
@@ -335,7 +341,7 @@ static int encoding_number(const char *enc) {
   } else if (!strcmp(enc, "ksc5601.1987-0")) {
     return 16;
   } else if (!strcmp(enc, "gb2312.1980-0") || !strcmp(enc, "gb2312.80-0") ||
-     !strcmp(enc, "gb2312.80&gb8565.88") ||  !strcmp(enc, "gb2312.80-0"))
+     !strcmp(enc, "gb2312.80&gb8565.88"))
   {
     return 17;
   } else if (!strcmp(enc, "jisx0201.1976-0")) {