The JPEG to vector graphic conversion isn't complete yet, but you can delete the imported snowflake now.
You should see that the tracing has some text below it that we need to remove. To do this, select the Rectangle tool from the Tools palette and draw a rectangle that completely covers the snowflake, but the bottom edge stops just above the horizontal line that appears above the small text. Now click on the Select tool and, holding the Shift key, click on the small text so that the rectangle and tracing are both selected. Now go to Path > Cut Path.

