Remove warnings from servo-gfx

src/servo-gfx/font.rs

@@ -293,7 +293,7 @@ pub impl Font {
             None => {}
         }
 
-        let mut scaled_font = self.create_azure_font();
+        let scaled_font = self.create_azure_font();
         self.azure_font = Some(scaled_font);
         // try again.
         return self.get_azure_font();
@@ -385,7 +385,7 @@ pub impl Font {
         for run.glyphs.iter_glyphs_for_char_range(range) |_i, glyph| {
             advance += glyph.advance();
         }
-        let mut bounds = Rect(Point2D(Au(0), -self.metrics.ascent),
+        let bounds = Rect(Point2D(Au(0), -self.metrics.ascent),
                               Size2D(advance, self.metrics.ascent + self.metrics.descent));
 
         // TODO(Issue #125): support loose and tight bounding boxes; using the

src/servo-gfx/font_context.rs

@@ -4,7 +4,6 @@
 
 use font::{Font, FontDescriptor, FontGroup, FontStyle, SelectorPlatformIdentifier};
 use font::{SpecifiedFontStyle, UsedFontStyle};
-use font_context;
 use font_list::FontList;
 use servo_util::cache::Cache;
 use servo_util::cache::MonoCache;

src/servo-gfx/render_layers.rs

@@ -32,7 +32,7 @@ pub fn render_layers(layer_ref: *RenderLayer,
                      f: RenderFn) -> LayerBufferSet {
     let tile_size = opts.tile_size;
 
-    let mut _buffers = match buffer_set { LayerBufferSet { buffers: b } => b };
+    let _buffers = match buffer_set { LayerBufferSet { buffers: b } => b };
 
     // FIXME: Try not to create a new array here.
     let mut new_buffer_ports = ~[];