Markup: New & better graphics, remove spec css element

PUBLISHING.md

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+# Publishing the annual PDF
+
+First, make sure you've provided appropriate front matter. `title`, `shortname`, `version`, and `date` are **mandatory**. If generating a final annual edition, date should reflect the date of the Ecma GA which will ratify the Standard. For example:
+
+```
+title: ECMAScript® 2024 Language Specification
+shortname: ECMA-262
+version: 15th Edition
+date: 2024-06-25
+```
+
+Use the package script `build-for-pdf`. Importantly, you want to make sure your image directory files wind up in the same output directory as your markup. Your `ecmarkup` command should include the options `--assets external`, `--assets-dir out`, and `--printable`.
+
+Then, run `prince` to generate your PDF.
+
+```shell
+prince --script ./node_modules/ecmarkup/js/print.js out/index.html -o path/to/output.pdf
+```
+
+Spend 5-10 minutes double-checking the PDF for egregious layout issues. That means quickly skimming all 800+ pages looking for whitespace or content split in a confusing manner. Tinker with print-only styles only as needed. Compare cover & table of contents to previous years.