Remove support for -xml out.xml

Deprecated over 20 years ago in 2003.  Use -xml -o out.xml instead.

CHANGES.current

@@ -38,6 +38,7 @@ Version 4.2.0 (in progress)
 	    -noextern option	On by default since SWIG 1.3.26 (2005-10-09)
 	    -noruntime		Type sharing happens via target lang global.
 	    -runtime		Type sharing happens via target lang global.
+	    -xml out.xml	Use -xml -o out.xml instead.
 
 2023-06-15: olly
 	    [Guile] Fix freearg typemaps to go with char **INOUT and char

Examples/xml/Makefile.in

@@ -30,7 +30,7 @@ check:
 	for f in $(all-dot-i-files) ; do				\
 	  base=`basename $$f .i` ;					\
 	  xml=$$base.xml ;						\
-	  $(SWIGINVOKE) -xml $$xml ${srcdir}/$$f ;	\
+	  $(SWIGINVOKE) -xml -o $$xml ${srcdir}/$$f ;	\
 	  cat $$xml | $(cleanup) | diff -c ${srcdir}/$$base.expected-xml - ;	\
 	done
 
@@ -43,9 +43,9 @@ distclean: clean
 # from here on, non-developers beware!
 
 %.expected-xml : %.i
-	$(SWIGINVOKE) -xml tmp-file $^
-	cat tmp-file | $(cleanup) > $@
-	rm -f tmp-file
+	$(SWIGINVOKE) -xml -o tmp-file.xml $^
+	cat tmp-file.xml | $(cleanup) > $@
+	rm -f tmp-file.xml
 
 all-expected-xml:
 	for f in $(all-dot-i-files) ; do \

Source/Modules/xml.cxx

@@ -16,9 +16,7 @@
 static const char *usage = "\
 XML Options (available with -xml)\n\
      -xmllang <lang> - Typedef language\n\
-     -xmllite        - More lightweight version of XML\n\
-     ------\n\
-     deprecated (use -o): -xml <output.xml> - Use <output.xml> as output file (extension .xml mandatory)\n";
+     -xmllite        - More lightweight version of XML\n";
 
 static File *out = 0;
 static int xmllite = 0;
@@ -39,23 +37,6 @@ public:
   virtual void main(int argc, char *argv[]) {
     SWIG_typemap_lang("xml");
     for (int iX = 0; iX < argc; iX++) {
-      if (strcmp(argv[iX], "-xml") == 0) {
-	char *extension = 0;
-	if (iX + 1 >= argc)
-	  continue;
-	extension = argv[iX + 1] + strlen(argv[iX + 1]) - 4;
-	if (strcmp(extension, ".xml"))
-	  continue;
-	iX++;
-	Swig_mark_arg(iX);
-	String *outfile = NewString(argv[iX]);
-	out = NewFile(outfile, "w", SWIG_output_files());
-	if (!out) {
-	  FileErrorDisplay(outfile);
-	  Exit(EXIT_FAILURE);
-	}
-	continue;
-      }
       if (strcmp(argv[iX], "-xmllang") == 0) {
 	Swig_mark_arg(iX);
 	iX++;