qemu: blockjob: Remove 'started' from struct _qemuBlockJobData

As of commit d1a44634 this field is unused.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_blockjob.h

@@ -71,7 +71,6 @@ struct _qemuBlockJobData {
 
     virDomainDiskDefPtr disk; /* may be NULL, if blockjob does not correspond to any disk */
 
-    bool started;
     int type; /* qemuBlockJobType */
     int state; /* qemuBlockjobState */
     char *errmsg;