meson.build: Remove ncurses workaround for OpenBSD

meson.build: Remove ncurses workaround for OpenBSD

OpenBSD 7.5 has upgraded to ncurses 6.4.

Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/meson.build b/meson.build
index d26690c..c26c417 100644
--- a/meson.build
+++ b/meson.build
@@ -1399,7 +1399,7 @@
 curses = not_found
 if have_system and get_option('curses').allowed()
   curses_test = '''
-    #if defined(__APPLE__) || defined(__OpenBSD__)
+    #ifdef __APPLE__
     #define _XOPEN_SOURCE_EXTENDED 1
     #endif
     #include <locale.h>
diff --git a/ui/curses.c b/ui/curses.c
index ec61615..4d0be9b 100644
--- a/ui/curses.c
+++ b/ui/curses.c
@@ -38,7 +38,7 @@
 #include "ui/input.h"
 #include "sysemu/sysemu.h"
 
-#if defined(__APPLE__) || defined(__OpenBSD__)
+#ifdef __APPLE__
 #define _XOPEN_SOURCE_EXTENDED 1
 #endif