Remove SaveVM v2 support

In previosu series I remove v2 support for RAM (that was the version that was
supported when SaveVM v3 appeared).  Now we can't load RAM for any image saved in SaveVM v2, we can as well remove SaveVM v2 entirely.

Note: That SaveVM RAM was at v2 when General SaveVM support went from v2 to v3 makes talking about versions confusing at least
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

savevm.c

@@ -1266,47 +1266,6 @@ typedef struct LoadStateEntry {
     int version_id;
 } LoadStateEntry;
 
-static int qemu_loadvm_state_v2(QEMUFile *f)
-{
-    SaveStateEntry *se;
-    int len, ret, instance_id, record_len, version_id;
-    int64_t total_len, end_pos, cur_pos;
-    char idstr[256];
-
-    total_len = qemu_get_be64(f);
-    end_pos = total_len + qemu_ftell(f);
-    for(;;) {
-        if (qemu_ftell(f) >= end_pos)
-            break;
-        len = qemu_get_byte(f);
-        qemu_get_buffer(f, (uint8_t *)idstr, len);
-        idstr[len] = '\0';
-        instance_id = qemu_get_be32(f);
-        version_id = qemu_get_be32(f);
-        record_len = qemu_get_be32(f);
-        cur_pos = qemu_ftell(f);
-        se = find_se(idstr, instance_id);
-        if (!se) {
-            fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
-                    instance_id, idstr);
-        } else {
-            ret = vmstate_load(f, se, version_id);
-            if (ret < 0) {
-                fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
-                        instance_id, idstr);
-                return ret;
-            }
-        }
-        /* always seek to exact end of record */
-        qemu_fseek(f, cur_pos + record_len, SEEK_SET);
-    }
-
-    if (qemu_file_has_error(f))
-        return -EIO;
-
-    return 0;
-}
-
 int qemu_loadvm_state(QEMUFile *f)
 {
     LIST_HEAD(, LoadStateEntry) loadvm_handlers =
@@ -1321,8 +1280,10 @@ int qemu_loadvm_state(QEMUFile *f)
         return -EINVAL;
 
     v = qemu_get_be32(f);
-    if (v == QEMU_VM_FILE_VERSION_COMPAT)
-        return qemu_loadvm_state_v2(f);
+    if (v == QEMU_VM_FILE_VERSION_COMPAT) {
+        fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
+        return -ENOTSUP;
+    }
     if (v != QEMU_VM_FILE_VERSION)
         return -ENOTSUP;