message: fix(svg): remove ad hoc fix of an SVG fill bug
  Fix the bug apache/incubator-echarts#9826
  This was caused by an ad hoc method (by setting fill="rgba(0,0,0,0.002)" for transparent elements) for an SVG bug on Chromium.
  Since it has been fixed more than a year, this is no longer needed.
  See more:
diff: @@ -62,26 +62,6 @@ function bindStyle(svgEl, style, isText, el) {
  if (pathHasFill(style, isText)) {
  var fill = isText ? style.textFill : style.fill;
  fill = fill === 'transparent' ? NONE : fill;
  -
  - /**
  - * FIXME:
  - * This is a temporary fix for Chrome's clipping bug
  - * that happens when a clip-path is referring another one.
  - * This fix should be used before Chrome's bug is fixed.
  - * For an element that has clip-path, and fill is none,
  - * set it to be "rgba(0, 0, 0, 0.002)" will hide the element.
  - * Otherwise, it will show black fill color.
  - * 0.002 is used because this won't work for alpha values smaller
  - * than 0.002.
  - *
  - * See
  - * https://bugs.chromium.org/p/chromium/issues/detail?id=659790
  - * for more information.
  - */
  - if (svgEl.getAttribute('clip-path') !== 'none' && fill === NONE) {
  - fill = 'rgba(0, 0, 0, 0.002)';
  - }
  -
  attr(svgEl, 'fill', fill);
  attr(svgEl, 'fill-opacity', style.fillOpacity != null ? style.fillOpacity * style.opacity : style.opacity);
  }
  