qerror: Finally unused, clean up

Remove it except for two things in qerror.h:

* Two #include to be cleaned up separately to avoid cluttering this
patch.

* The QERR_ macros. Mark as obsolete.

Backports commit 4629ed1e98961bbe678db68ef5f4342ff174a6c3 from qemu

qemu/include/qapi/qmp/qerror.h

@@ -13,24 +13,10 @@
 #define QERROR_H
 
 #include "qapi/qmp/qstring.h"
-#include "qapi/error.h"
-#include "qapi-types.h"
-#include <stdarg.h>
-
-typedef struct QError {
-    QObject_HEAD;
-    char *err_msg;
-    ErrorClass err_class;
-} QError;
-
-QString *qerror_human(const QError *qerror);
-void qerror_report(ErrorClass err_class, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
-void qerror_report_err(Error *err);
 
 /*
- * QError class list
+ * These macros will go away, please don't use in new code, and do not
- * Please keep the definitions in alphabetical order.
+ * add new ones!
- * Use scripts/check-qerror.sh to check.
  */
 #define QERR_BASE_NOT_FOUND \
     "Base '%s' not found"

qemu/qobject/Makefile.objs

@@ -1,2 +1 @@
 util-obj-y = qint.o qstring.o qdict.o qlist.o qfloat.o qbool.o
-util-obj-y += qerror.o

qemu/qobject/qerror.c

@@ -1,39 +0,0 @@
-/*
- * QError Module
- *
- * Copyright (C) 2009 Red Hat Inc.
- *
- * Authors:
- *  Luiz Capitulino <lcapitulino@redhat.com>
- *
- * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
- * See the COPYING.LIB file in the top-level directory.
- */
-
-#include "qapi/qmp/qjson.h"
-#include "qapi/qmp/qerror.h"
-#include "qemu-common.h"
-
-
-/**
- * qerror_human(): Format QError data into human-readable string.
- */
-QString *qerror_human(const QError *qerror)
-{
-    return qstring_from_str(qerror->err_msg);
-}
-
-void qerror_report(ErrorClass eclass, const char *fmt, ...)
-{
-}
-
-/* Evil... */
-struct Error
-{
-    char *msg;
-    ErrorClass err_class;
-};
-
-void qerror_report_err(Error *err)
-{
-}