Dead code in @at-root query parsing

[connorskees]

dart-sass/lib/src/parse/stylesheet.dart

Lines 768 to 772 in 641d8e1

	Interpolation _atRootQuery() {
	if (scanner.peekChar() == $hash) {
	var interpolation = singleInterpolation();
	return Interpolation([interpolation], interpolation.span);
	}

This branch can never be true, as this function is only called if the below condition is true:

dart-sass/lib/src/parse/stylesheet.dart

Lines 753 to 754 in 641d8e1

	if (scanner.peekChar() == $lparen) {
	var query = _atRootQuery();