Remove support for <animateColor>.

LayoutTests/svg/animations/script-tests/animate-color-fill-from-by.js

 description("Tests animation on 'currentColor'.");
 createSVGTestCase();
 
 // Setup test document
 var rect = createSVGElement("rect");
 rect.setAttribute("id", "rect");
 rect.setAttribute("width", "100px");
 rect.setAttribute("height", "100px");
 rect.setAttribute("fill", "currentColor");
 rect.setAttribute("color", "#d00000");
 rect.setAttribute("onclick", "executeTest()");
 
-var animateColor = createSVGElement("animateColor");
+var animateColor = createSVGElement("animate");
 animateColor.setAttribute("id", "animateColor");
 animateColor.setAttribute("attributeName", "color");
 animateColor.setAttribute("from", "#d00000");
 animateColor.setAttribute("by", "#0000d0");
 animateColor.setAttribute("dur", "3s");
 animateColor.setAttribute("begin", "click");
 animateColor.setAttribute("fill", "freeze");
 rect.appendChild(animateColor);
 rootSVGElement.appendChild(rect);
 
@@ skipping 24 matching lines @@
         // [animationId, time, sampleCallback]
         ["animateColor", 0.0, sample1],
         ["animateColor", 1.5, sample2],
         ["animateColor", 3.0, sample3]
     ];
 
     runAnimationTest(expectedValues);
 }
 
 var successfullyParsed = true;