Ports: Remove obsolete patches for libexpat

Ports/libexpat/patches/fix-visibility.patch

@@ -1,66 +0,0 @@
-diff -Naur expat-2.2.9/examples/elements.c expat-2.2.9.serenity/examples/elements.c
---- expat-2.2.9/examples/elements.c	2019-09-21 17:23:24.000000000 +0200
-+++ expat-2.2.9.serenity/examples/elements.c	2021-04-11 03:55:14.027401389 +0200
-@@ -70,6 +70,7 @@
-   *depthPtr -= 1;
- }
- 
-+__attribute__((visibility("default")))
- int
- main(int argc, char *argv[]) {
-   char buf[BUFSIZ];
-diff -Naur expat-2.2.9/examples/outline.c expat-2.2.9.serenity/examples/outline.c
---- expat-2.2.9/examples/outline.c	2019-09-21 17:23:24.000000000 +0200
-+++ expat-2.2.9.serenity/examples/outline.c	2021-04-11 03:55:51.864760235 +0200
-@@ -79,6 +79,7 @@
-   Depth--;
- }
- 
-+__attribute__((visibility("default")))
- int
- main(int argc, char *argv[]) {
-   XML_Parser p = XML_ParserCreate(NULL);
-diff -Naur expat-2.2.9/tests/benchmark/benchmark.c expat-2.2.9.serenity/tests/benchmark/benchmark.c
---- expat-2.2.9/tests/benchmark/benchmark.c	2019-09-21 17:23:24.000000000 +0200
-+++ expat-2.2.9.serenity/tests/benchmark/benchmark.c	2021-04-11 03:57:00.892671995 +0200
-@@ -54,6 +54,7 @@
-   exit(rc);
- }
- 
-+__attribute__((visibility("default")))
- int
- main(int argc, char *argv[]) {
-   XML_Parser parser;
-diff -Naur expat-2.2.9/tests/runtests.c expat-2.2.9.serenity/tests/runtests.c
---- expat-2.2.9/tests/runtests.c	2019-09-26 00:03:02.000000000 +0200
-+++ expat-2.2.9.serenity/tests/runtests.c	2021-04-11 03:56:30.438792094 +0200
-@@ -11566,6 +11566,7 @@
-   return s;
- }
- 
-+__attribute__((visibility("default")))
- int
- main(int argc, char *argv[]) {
-   int i, nf;
-diff -Naur expat-2.2.9/xmlwf/ct.c expat-2.2.9.serenity/xmlwf/ct.c
---- expat-2.2.9/xmlwf/ct.c	2019-09-21 17:23:24.000000000 +0200
-+++ expat-2.2.9.serenity/xmlwf/ct.c	2021-04-11 03:57:26.136455396 +0200
-@@ -164,6 +164,7 @@
-   }
- }
- 
-+__attribute__((visibility("default")))
- int
- main(int argc, char **argv) {
-   char buf[CHARSET_MAX];
-diff -Naur expat-2.2.9/xmlwf/xmlwf.c expat-2.2.9.serenity/xmlwf/xmlwf.c
---- expat-2.2.9/xmlwf/xmlwf.c	2019-09-21 17:23:24.000000000 +0200
-+++ expat-2.2.9.serenity/xmlwf/xmlwf.c	2021-04-11 03:59:32.375335879 +0200
-@@ -891,6 +891,7 @@
- int wmain(int argc, XML_Char **argv);
- #endif
- 
-+__attribute__((visibility("default")))
- int
- tmain(int argc, XML_Char **argv) {
-   int i, j;