The following code is flagged as dead (since it's *replacing* rather than updating the existing Object):
https://github.com/mozilla/pdf.js/blob/4483cba72410027acf46630ebf252ae529704476/src/core/xfa/template.js#L2336-L2339
according to the alert in https://github.com/mozilla/pdf.js/security/code-scanning/103?query=ref%3Arefs%2Fheads%2Fmaster

Looking at the surrounding code, I can see a couple of possibilities here:
 1. This is indeed just dead code, which should be removed.
 2. The code should be moved up, and placed just *above* the previous block instead.
 3. There should be other, more invasive, changes made to this code...

/cc @calixteman Which solution is correct here?
Assuming it's either option 1 or 2, I can submit a patch to fix this.
constructor(attributes) {
    super(TEMPLATE_NS_ID, "font",  true);
    this.baselineShift = getMeasurement(attributes.baselineShift);
    this.fontHorizontalScale = getFloat({
      data: attributes.fontHorizontalScale,
      defaultValue: 100,
      validate: x => x >= 0,
    });
    this.fontVerticalScale = getFloat({
      data: attributes.fontVerticalScale,
      defaultValue: 100,
      validate: x => x >= 0,
    });
    this.id = attributes.id || "";
    this.kerningMode = getStringOption(attributes.kerningMode, [
      "none",
      "pair",
    ]);
    this.letterSpacing = getMeasurement(attributes.letterSpacing, "0");
    this.lineThrough = getInteger({
      data: attributes.lineThrough,
      defaultValue: 0,
      validate: x => x === 1 || x === 2,
    });
    this.lineThroughPeriod = getStringOption(attributes.lineThroughPeriod, [
      "all",