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: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

include/qapi/qmp/qerror.h

diff --git a/include/qapi/qmp/qerror.h b/include/qapi/qmp/qerror.h
index f5335e6..902d1a7 100644
--- a/include/qapi/qmp/qerror.h
+++ b/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

diff --git a/util/error.c b/util/error.c
index f11f1d5..2bb42e1 100644
--- a/util/error.c
+++ b/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
 {