Remove unnecessary cycle between FontEntry and FontFamily.

src/components/servo-gfx/font_list.rs

@@ -132,7 +132,6 @@ impl FontFamily {
 /// In the common case, each FontFamily will have a singleton FontEntry, or it will have the
 /// standard four faces: Normal, Bold, Italic, BoldItalic.
 pub struct FontEntry {
-    family: @mut FontFamily,
     face_name: ~str,
     priv weight: CSSFontWeight,
     priv italic: bool,
@@ -141,9 +140,8 @@ pub struct FontEntry {
 }
 
 impl FontEntry {
-    pub fn new(family: @mut FontFamily, handle: FontHandle) -> FontEntry {
+    pub fn new(handle: FontHandle) -> FontEntry {
         FontEntry {
-            family: family,
             face_name: handle.face_name(),
             weight: handle.boldness(),
             italic: handle.is_italic(),

src/components/servo-gfx/platform/linux/font_list.rs

@@ -116,7 +116,7 @@ pub impl FontListHandle {
                 let font_handle = font_handle.unwrap();
 
                 debug!("Creating new FontEntry for face: %s", font_handle.face_name());
-                let entry = @FontEntry::new(family, font_handle);
+                let entry = @FontEntry::new(font_handle);
                 family.entries.push(entry);
             }
 

src/components/servo-gfx/platform/macos/font_list.rs

@@ -51,7 +51,7 @@ pub impl FontListHandle {
             let handle = result::unwrap(FontHandle::new_from_CTFont(&self.fctx, font));
 
             debug!("Creating new FontEntry for face: %s", handle.face_name());
-            let entry = @FontEntry::new(family, handle);
+            let entry = @FontEntry::new(handle);
             family.entries.push(entry)
         }
     }