Fix visual bug on grade

[lishaduck]

I whipped out inspect to figure out this peeve of mine lol

Some grades have this:

Add this:

/** Licensed CC0 */
#grades_summary td.details a {
  text-decoration: none;
}

To this section:

canvas-lms/app/stylesheets/bundles/grade_summary.scss

Lines 172 to 179 in 7b48e82

	& a {
	color: $ic-icon-link-color;
	&:hover, &:focus {
	color: $ic-icon-link-color-hover;
	}
	&.turnitin_similarity_score {
	color: $ic-color-light;
	}

Now it looks like this: