[librsvg] rust/src: Remove unused muts, modules, etc.

[Federico Mena Quintero <federico src gnome org>]

commit 112ce31aa0193de9601f90c3316e6ecb66cae48d
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Feb 21 20:03:21 2017 -0600

    rust/src: Remove unused muts, modules, etc.

 rust/src/node.rs        |   33 ++++++++++++++++-----------------
 rust/src/path_parser.rs |    1 -
 2 files changed, 16 insertions(+), 18 deletions(-)
---
diff --git a/rust/src/node.rs b/rust/src/node.rs
index 5b52ebc..ef8543e 100644
--- a/rust/src/node.rs
+++ b/rust/src/node.rs
@@ -276,15 +276,14 @@ mod tests {
     use state::RsvgState;
     use super::*;
     use std::ptr;
-    use std::mem;
 
     struct TestNodeImpl {}
 
     impl NodeTrait for TestNodeImpl {
-        fn set_atts (&self, node: &RsvgNode, handle: *const RsvgHandle, pbag: *const RsvgPropertyBag) {
+        fn set_atts (&self, _: &RsvgNode, _: *const RsvgHandle, _: *const RsvgPropertyBag) {
         }
 
-        fn draw (&self, node: &RsvgNode, draw_ctx: *const RsvgDrawingCtx, dominate: i32) {
+        fn draw (&self, _: &RsvgNode, _: *const RsvgDrawingCtx, _: i32) {
         }
 
         fn get_c_impl (&self) -> *const RsvgCNodeImpl {
@@ -299,18 +298,18 @@ mod tests {
                                        ptr::null_mut (),
                                        Box::new (TestNodeImpl {})));
 
-        let mut ref1 = box_node (node);
+        let ref1 = box_node (node);
 
         let new_node: &mut RsvgNode = unsafe { &mut *ref1 };
         let weak = Rc::downgrade (new_node);
 
-        let mut ref2 = unsafe { rsvg_node_ref (new_node) };
+        let ref2 = rsvg_node_ref (new_node);
         assert! (weak.upgrade ().is_some ());
 
-        ref2 = unsafe { rsvg_node_unref (ref2) };
+        rsvg_node_unref (ref2);
         assert! (weak.upgrade ().is_some ());
 
-        ref1 = unsafe { rsvg_node_unref (ref1) };
+        rsvg_node_unref (ref1);
         assert! (weak.upgrade ().is_none ());
     }
 
@@ -321,14 +320,14 @@ mod tests {
                                        ptr::null_mut (),
                                        Box::new (TestNodeImpl {})));
 
-        let mut ref1 = box_node (node);
+        let ref1 = box_node (node);
 
-        let mut ref2 = unsafe { rsvg_node_ref (ref1) };
+        let ref2 = rsvg_node_ref (ref1);
 
-        unsafe { assert! (rsvg_node_is_same (ref1, ref2)); }
+        assert! (rsvg_node_is_same (ref1, ref2));
 
-        ref1 = rsvg_node_unref (ref1);
-        ref2 = rsvg_node_unref (ref2);
+        rsvg_node_unref (ref1);
+        rsvg_node_unref (ref2);
     }
 
     #[test]
@@ -338,18 +337,18 @@ mod tests {
                                        ptr::null_mut (),
                                        Box::new (TestNodeImpl {})));
 
-        let mut ref1 = box_node (node1);
+        let ref1 = box_node (node1);
 
         let node2 = Rc::new (Node::new (NodeType::Path,
                                        None,
                                        ptr::null_mut (),
                                        Box::new (TestNodeImpl {})));
 
-        let mut ref2 = box_node (node2);
+        let ref2 = box_node (node2);
 
-        unsafe { assert! (!rsvg_node_is_same (ref1, ref2)); }
+        assert! (!rsvg_node_is_same (ref1, ref2));
 
-        ref1 = rsvg_node_unref (ref1);
-        ref2 = rsvg_node_unref (ref2);
+        rsvg_node_unref (ref1);
+        rsvg_node_unref (ref2);
     }
 }
diff --git a/rust/src/path_parser.rs b/rust/src/path_parser.rs
index 82cd409..782d129 100644
--- a/rust/src/path_parser.rs
+++ b/rust/src/path_parser.rs
@@ -1018,7 +1018,6 @@ pub extern fn rsvg_path_parser_from_str_into_builder (path_str: *const libc::c_c
 #[cfg(test)]
 mod tests {
     use super::*;
-    use path_builder::*;
 
     extern crate cairo;