Remove support for <animateColor>.

LayoutTests/svg/animations/script-tests/animate-color-transparent.js

 description("Tests that 'transparent' is treated as a valid color.");
 createSVGTestCase();
 
 // Setup test document
 var rect = createSVGElement("rect");
 rect.setAttribute("id", "test");
 rect.setAttribute("width", "100px");
 rect.setAttribute("height", "100px");
 rect.setAttribute("fill", "#00FF00");
 rect.setAttribute("onclick", "executeTest()");
 
-var animate = createSVGElement("animateColor");
+var animate = createSVGElement("animate");
 animate.setAttribute("id", "animation");
 animate.setAttribute("attributeName", "fill");
 animate.setAttribute("from", "transparent");
 animate.setAttribute("by", "red");
 animate.setAttribute("dur", "3s");
 animate.setAttribute("begin", "click");
 rect.appendChild(animate);
 rootSVGElement.appendChild(rect);
 
 // Setup animation test
@@ skipping 10 matching lines @@
         // [animationId, time, sampleCallback]
         ["animation", 0.0, expectTransparent],
         ["animation", 1.5, expectOtherColor]
     ];
 
     runAnimationTest(expectedValues);
 }
 
 var successfullyParsed = true;