Ports: Remove obsolete patches for <limits.h>

Ports/mrsh/patches/workaround-limits-include-order.patch

@@ -1,33 +0,0 @@
---- a/builtin/cd.c	2020-02-03 17:38:39.619544218 +0300
-+++ b/builtin/cd.c	2020-02-03 17:39:18.387886672 +0300
-@@ -10,6 +10,8 @@
- #include <unistd.h>
- #include "builtin.h"
- 
-+#define PATH_MAX 4096
-+
- static const char cd_usage[] = "usage: cd [-L|-P] [-|directory]\n";
- 
- static int cd(struct mrsh_state *state, const char *path) {
---- a/shell/entry.c	2020-02-03 18:02:41.502709181 +0300
-+++ b/shell/entry.c	2020-02-03 18:03:02.254888038 +0300
-@@ -12,6 +12,8 @@
- #include "parser.h"
- #include "shell/trap.h"
- 
-+#define PATH_MAX 4096
-+
- static char *expand_str(struct mrsh_state *state, const char *src) {
- 	struct mrsh_parser *parser = mrsh_parser_with_data(src, strlen(src));
- 	if (parser == NULL) {
---- a/shell/path.c	2020-02-03 18:03:55.014342748 +0300
-+++ b/shell/path.c	2020-02-03 18:04:08.167456108 +0300
-@@ -8,6 +8,8 @@
- #include <unistd.h>
- #include "shell/path.h"
- 
-+#define PATH_MAX 4096
-+
- const char *expand_path(struct mrsh_state *state, const char *file, bool exec,
- 		bool default_path) {
- 	if (strchr(file, '/')) {