virsh: Resolve Coverity DEADCODE

Since 0766783abb

Coverity complains that the EDIT_FREE definition results in DEADCODE.

As it turns out with the change to use the EDIT_FREE macro the call to
vir*Free() wouldn't be necessary nor would it happen...

Prior code to above commitid would :

  vir*Ptr foo = NULL;
  ...
  foo = vir*GetXMLDesc()
  ...
  vir*Free(foo);
  foo = vir*DefineXML()
  ...

And thus the free was needed.  With the change to use EDIT_FREE the
same code changed to:

  vir*Ptr foo = NULL;
  vir*Ptr foo_edited = NULL;
  ...
  foo = vir*GetXMLDesc()
  ...
  if (foo_edited)
      vir*Free(foo_edited);
  foo_edited = vir*DefineXML()
  ...

However, foo_edited could never be set in the code path - even with
all the goto's since the only way for it to be set is if vir*DefineXML()
succeeds in which case the code to allow a retry (and thus all the goto's)
never leaves foo_edited set

All error paths lead to "cleanup:" which causes both foo and foo_edited
to call the respective vir*Free() routines if set.

Signed-off-by: John Ferlan <jferlan@redhat.com>

tools/virsh-snapshot.c

@@ -589,9 +589,6 @@ cmdSnapshotEdit(vshControl *ctl, const vshCmd *cmd)
     (strstr(doc, "<state>disk-snapshot</state>") ? \
     define_flags |= VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY : 0), \
     edited = virDomainSnapshotCreateXML(dom, doc_edited, define_flags)
-#define EDIT_FREE \
-    if (edited) \
-        virDomainSnapshotFree(edited);
 #include "virsh-edit.c"
 
     edited_name = virDomainSnapshotGetName(edited);