os-posix.c: remove unneeded #includes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230901101302.3618955-7-mjt@tls.msk.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

os-posix.c

@@ -29,8 +29,6 @@
 #include <grp.h>
 #include <libgen.h>
 
-/* Needed early for CONFIG_BSD etc. */
-#include "net/slirp.h"
 #include "qemu/error-report.h"
 #include "qemu/log.h"
 #include "sysemu/runstate.h"