ext/iconv/tests/bug76249.phpt: drop //IGNORE suffix

This test performs a conversion from UCS-2 to UTF-8 using iconv and
stream filters, with the suffix "//IGNORE" being added to the target
charset. This magic //IGNORE string was recently standardized in POSIX
2024, but it is not yet portable: musl for example will simply fail
when it encounters //IGNORE in what is supposed to be a charset name.

Fortunately, we do not need to think too hard about the general
problem here: the input is "abc", which has no un-translatable
sequences. We can simply drop the "//IGNORE".

Author: orlitzky

ext/iconv/tests/bug76249.phpt

@@ -7,13 +7,13 @@ iconv
 $fh = fopen('php://memory', 'rw');
 fwrite($fh, "abc");
 rewind($fh);
-if (false === @stream_filter_append($fh, 'convert.iconv.ucs-2/utf8//IGNORE', STREAM_FILTER_READ, [])) {
-    stream_filter_append($fh, 'convert.iconv.ucs-2/utf-8//IGNORE', STREAM_FILTER_READ, []);
+if (false === @stream_filter_append($fh, 'convert.iconv.ucs-2/utf8', STREAM_FILTER_READ, [])) {
+    stream_filter_append($fh, 'convert.iconv.ucs-2/utf-8', STREAM_FILTER_READ, []);
 }
 var_dump(stream_get_contents($fh));
 ?>
 DONE
 --EXPECTF--
-Warning: stream_get_contents(): iconv stream filter ("ucs-2"=>"utf%A8//IGNORE"): invalid multibyte sequence in %sbug76249.php on line %d
+Warning: stream_get_contents(): iconv stream filter ("ucs-2"=>"utf%A8"): invalid multibyte sequence in %sbug76249.php on line %d
 string(0) ""
 DONE