error: Remove some unused headers

Makes it a bit clear how the interdependencies work.

Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: NCole Robinson <crobinso@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

include/qapi/qmp/qerror.h

@@ -12,7 +12,6 @@
 #ifndef QERROR_H
 #define QERROR_H
 
-#include "qapi/qmp/qdict.h"
 #include "qapi/qmp/qstring.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"

util/error.c

@@ -12,10 +12,7 @@
 
 #include "qemu-common.h"
 #include "qapi/error.h"
-#include "qapi/qmp/qjson.h"
-#include "qapi/qmp/qdict.h"
-#include "qapi-types.h"
-#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
 
 struct Error
 {