qapi: Remove qobject_to_X() functions

They are no longer needed now.

Backports commit cb51b976babf7ee16dc5eda4f2189d65b8b700a3 from qemu

qemu/include/qapi/qmp/qbool.h

@@ -24,7 +24,6 @@ struct QBool {
 
 QBool *qbool_from_bool(bool value);
 bool qbool_get_bool(const QBool *qb);
-QBool *qobject_to_qbool(const QObject *obj);
 bool qbool_is_equal(const QObject *x, const QObject *y);
 void qbool_destroy_obj(QObject *obj);
 

qemu/include/qapi/qmp/qdict.h

@@ -40,7 +40,6 @@ void qdict_put_obj(QDict *qdict, const char *key, QObject *value);
 void qdict_del(QDict *qdict, const char *key);
 int qdict_haskey(const QDict *qdict, const char *key);
 QObject *qdict_get(const QDict *qdict, const char *key);
-QDict *qobject_to_qdict(const QObject *obj);
 bool qdict_is_equal(const QObject *x, const QObject *y);
 void qdict_iter(const QDict *qdict,
                 void (*iter)(const char *key, QObject *obj, void *opaque),

qemu/include/qapi/qmp/qlist.h

@@ -53,7 +53,6 @@ QObject *qlist_pop(QList *qlist);
 QObject *qlist_peek(QList *qlist);
 int qlist_empty(const QList *qlist);
 size_t qlist_size(const QList *qlist);
-QList *qobject_to_qlist(const QObject *obj);
 bool qlist_is_equal(const QObject *x, const QObject *y);
 void qlist_destroy_obj(QObject *obj);
 

qemu/include/qapi/qmp/qnum.h

@@ -68,7 +68,6 @@ double qnum_get_double(QNum *qn);
 
 char *qnum_to_string(QNum *qn);
 
-QNum *qobject_to_qnum(const QObject *obj);
 bool qnum_is_equal(const QObject *x, const QObject *y);
 void qnum_destroy_obj(QObject *obj);
 

qemu/include/qapi/qmp/qstring.h

@@ -31,7 +31,6 @@ const char *qstring_get_str(const QString *qstring);
 void qstring_append_int(QString *qstring, int64_t value);
 void qstring_append(QString *qstring, const char *str);
 void qstring_append_chr(QString *qstring, int c);
-QString *qobject_to_qstring(const QObject *obj);
 bool qstring_is_equal(const QObject *x, const QObject *y);
 void qstring_destroy_obj(QObject *obj);
 

qemu/qobject/qbool.c

@@ -39,17 +39,6 @@ bool qbool_get_bool(const QBool *qb)
     return qb->value;
 }
 
-/**
- * qobject_to_qbool(): Convert a QObject into a QBool
- */
-QBool *qobject_to_qbool(const QObject *obj)
-{
-    if (!obj || qobject_type(obj) != QTYPE_QBOOL) {
-        return NULL;
-    }
-    return container_of(obj, QBool, base);
-}
-
 /**
  * qbool_is_equal(): Test whether the two QBools are equal
  */

qemu/qobject/qdict.c

@@ -37,17 +37,6 @@ QDict *qdict_new(void)
     return qdict;
 }
 
-/**
- * qobject_to_qdict(): Convert a QObject into a QDict
- */
-QDict *qobject_to_qdict(const QObject *obj)
-{
-    if (!obj || qobject_type(obj) != QTYPE_QDICT) {
-        return NULL;
-    }
-    return container_of(obj, QDict, base);
-}
-
 /**
  * tdb_hash(): based on the hash agorithm from gdbm, via tdb
  * (from module-init-tools)

qemu/qobject/qlist.c

@@ -154,17 +154,6 @@ size_t qlist_size(const QList *qlist)
     return count;
 }
 
-/**
- * qobject_to_qlist(): Convert a QObject into a QList
- */
-QList *qobject_to_qlist(const QObject *obj)
-{
-    if (!obj || qobject_type(obj) != QTYPE_QLIST) {
-        return NULL;
-    }
-    return container_of(obj, QList, base);
-}
-
 /**
  * qlist_is_equal(): Test whether the two QLists are equal
  *

qemu/qobject/qnum.c

@@ -199,17 +199,6 @@ char *qnum_to_string(QNum *qn)
     return NULL;
 }
 
-/**
- * qobject_to_qnum(): Convert a QObject into a QNum
- */
-QNum *qobject_to_qnum(const QObject *obj)
-{
-    if (!obj || qobject_type(obj) != QTYPE_QNUM) {
-        return NULL;
-    }
-    return container_of(obj, QNum, base);
-}
-
 /**
  * qnum_is_equal(): Test whether the two QNums are equal
  *

qemu/qobject/qstring.c

@@ -104,17 +104,6 @@ void qstring_append_chr(QString *qstring, int c)
     qstring->string[qstring->length] = 0;
 }
 
-/**
- * qobject_to_qstring(): Convert a QObject to a QString
- */
-QString *qobject_to_qstring(const QObject *obj)
-{
-    if (!obj || qobject_type(obj) != QTYPE_QSTRING) {
-        return NULL;
-    }
-    return container_of(obj, QString, base);
-}
-
 /**
  * qstring_get_str(): Return a pointer to the stored string
  *