error: error_is_set() is finally unused; remove

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

include/qapi/error.h

diff --git a/include/qapi/error.h b/include/qapi/error.h
index 7995801..d712089 100644
--- a/include/qapi/error.h
+++ b/include/qapi/error.h
@@ -67,12 +67,6 @@
  */
 void error_setg_file_open(Error **errp, int os_errno, const char *filename);
 
-/**
- * Returns true if an indirect pointer to an error is pointing to a valid
- * error object.
- */
-bool error_is_set(Error **errp);
-
 /*
  * Get the error class of an error object.
  */

util/error.c

diff --git a/util/error.c b/util/error.c
index 66245cc..2ace0d8 100644
--- a/util/error.c
+++ b/util/error.c
@@ -142,11 +142,6 @@
     return err_new;
 }
 
-bool error_is_set(Error **errp)
-{
-    return (errp && *errp);
-}
-
 ErrorClass error_get_class(const Error *err)
 {
     return err->err_class;