qapi: Inline and remove QERR_DEVICE_HAS_NO_MEDIUM definition

Address the comment added in commit 4629ed1e98
("qerror: Finally unused, clean up"), from 2015:

  /*
   * These macros will go away, please don't use
   * in new code, and do not add new ones!
   */

Mechanical transformation using sed, and manual cleanup.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240312141343.3168265-4-armbru@redhat.com>

block/snapshot.c

@@ -28,7 +28,6 @@
 #include "block/qdict.h"
 #include "qapi/error.h"
 #include "qapi/qmp/qdict.h"
-#include "qapi/qmp/qerror.h"
 #include "qapi/qmp/qstring.h"
 #include "qemu/option.h"
 #include "sysemu/block-backend.h"
@@ -359,7 +358,8 @@ int bdrv_snapshot_delete(BlockDriverState *bs,
     GLOBAL_STATE_CODE();
 
     if (!drv) {
-        error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
+        error_setg(errp, "Device '%s' has no medium",
+                   bdrv_get_device_name(bs));
         return -ENOMEDIUM;
     }
     if (!snapshot_id && !name) {
@@ -437,7 +437,8 @@ int bdrv_snapshot_load_tmp(BlockDriverState *bs,
     GRAPH_RDLOCK_GUARD_MAINLOOP();
 
     if (!drv) {
-        error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
+        error_setg(errp, "Device '%s' has no medium",
+                   bdrv_get_device_name(bs));
         return -ENOMEDIUM;
     }
     if (!snapshot_id && !name) {

blockdev.c

@@ -1395,7 +1395,7 @@ static void external_snapshot_action(TransactionAction *action,
     bdrv_drained_begin(state->old_bs);
 
     if (!bdrv_is_inserted(state->old_bs)) {
-        error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM,
+        error_setg(errp, "Device '%s' has no medium",
                    bdrv_get_device_or_node_name(state->old_bs));
         return;
     }

include/qapi/qmp/qerror.h

@@ -17,9 +17,6 @@
  * add new ones!
  */
 
-#define QERR_DEVICE_HAS_NO_MEDIUM \
-    "Device '%s' has no medium"
-
 #define QERR_DEVICE_NO_HOTPLUG \
     "Device '%s' does not support hotplugging"