This is a chess piece and i want to remove the shadowy effect in this. Is there a way to work around this problem?
Had the image been drawn with a drop-shadow filter applied, you could have removed it. To do that you'd select the chess piece, then from the filters menu and choose Remove Filters. That would remove all the filters.
Unfortunately you don't really have an SVG drawing at all. What you have is a raster image of the chess piece wrapped in an SVG file. I.e.
<svg width="200" height="200"> <image id="image0" width="200" height="200" x="0" y="0" xlink:href="data:image/png;*raster image data*"/> </svg>
There's not much you can do here other than redraw the image you want from scratch in the editor as SVG.