pkg/csslib: remove unused vars and fields

lib/src/property.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /** Representations of CSS styles. */
 
 part of csslib.parser;
 
 // TODO(terry): Prune down this file we do need some of the code in this file
 //              for darker, lighter, how to represent a Font, etc but alot of
@@ skipping 596 matching lines @@
   String toHexArgbString() => Color.convertToHexString(r, g, b, a);
 
   int get argbValue {
     int value = 0;
     if (a != null) {
       value = (a.toInt() << 0x18);
     }
     value += (r << 0x10);
     value += (g << 0x08);
     value += b;
+    return value;
   }
 
   Color get color => new Color.createRgba(r, g, b, a);
   Hsla get hsla => new Hsla.fromRgba(this);
 
   Rgba darker(num amount) => Color._createNewTintShadeFromRgba(this, -amount);
   Rgba lighter(num amount) => Color._createNewTintShadeFromRgba(this, amount);
 
   int get hashCode => toHexArgbString().hashCode;
 }
@@ skipping 596 matching lines @@
   num get width => (left != null ? left : 0) + (right != null ? right : 0);
 
   /**
    * The total size of the vertical edges. Equal to [top] + [bottom], where
    * null is interpreted as 0px.
    */
   num get height => (top != null ? top : 0) + (bottom != null ? bottom : 0);
 }
 
 _mergeVal(x, y) => y != null ? y : x;