Fix vmstate regression

Commit e7362700b ("msvc: enable vmstate code on !gnuc") forgot to remove
HAVE_VMSTATE condition...

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
diff --git a/src/state.c b/src/state.c
index d5689ba..f10edf0 100644
--- a/src/state.c
+++ b/src/state.c
@@ -26,8 +26,6 @@
 #include "vmstate.h"
 #include "stream.h"
 
-#ifdef HAVE_VMSTATE
-
 static int slirp_tcp_post_load(void *opaque, int version)
 {
     tcp_template((struct tcpcb *)opaque);
@@ -377,19 +375,6 @@
     return slirp_vmstate_load_state(&f, &vmstate_slirp, slirp, version_id);
 }
 
-#else /* HAVE_VMSTATE */
-int slirp_state_save(Slirp *slirp, SlirpWriteCb write_cb, void *opaque)
-{
-    return -ENOSYS;
-}
-
-int slirp_state_load(Slirp *slirp, int version_id, SlirpReadCb read_cb,
-                     void *opaque)
-{
-    return -ENOSYS;
-}
-#endif /* HAVE_VMSTATE */
-
 int slirp_state_version(void)
 {
     return 4;
diff --git a/src/vmstate.c b/src/vmstate.c
index be16683..2c3a727 100644
--- a/src/vmstate.c
+++ b/src/vmstate.c
@@ -45,8 +45,6 @@
 #include "stream.h"
 #include "vmstate.h"
 
-#ifdef HAVE_VMSTATE
-
 static int get_nullptr(SlirpIStream *f, void *pv, size_t size,
                        const VMStateField *field)
 {
@@ -445,5 +443,3 @@
     }
     return ret;
 }
-
-#endif /* HAVE_VMSTATE */