[librsvg/rustification] Remove unused field

[Federico Mena Quintero <federico src gnome org>]

commit fc13538125fe2563689398fc4d4cd5d591b77959
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Nov 9 12:08:25 2016 -0600

    Remove unused field

 rsvg-private.h |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/rsvg-private.h b/rsvg-private.h
index 68a01fb..95e2f2f 100644
--- a/rsvg-private.h
+++ b/rsvg-private.h
@@ -144,7 +144,6 @@ struct RsvgHandlePrivate {
     /* stack; there is a state for each element */
 
     RsvgDefs *defs;
-    guint nest_level;
     RsvgNode *currentnode;
     /* this is the root level of the displayable tree, essentially what the
        file is converted into at the end */