removed extra extraneous comments

Cuts the multi-line rationale blocks down to what a reader of the file
needs. The reasoning behind the tagging setup belongs in the commit
messages that introduced it, not repeated above every \DocumentMetadata
block.

Also trims the README: drops the consequence clause explaining what
happens when the standard is declared without the tagging, drops the
quoted TeX Live 2024 error message, and notes that sid has a new enough
TeX Live for anyone not on Overleaf. Adds the caveat that a veraPDF
PASS is necessary but not sufficient, since a document whose body text
is all artifact passes too.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

paper_template/text.tex

@@ -1,14 +1,4 @@
-% Tagged PDF (PDF/UA-2) accessibility setup. The article class works
-% with the LaTeX tagging project, so we use the full \DocumentMetadata
-% path here.
-%
-% tagging=on is what actually builds the structure tree: it loads the
-% kernel code that tags paragraphs, headings, lists, tables, and
-% floats. Declaring pdfstandard=ua-2 on its own only writes the claim
-% into the metadata; without tagging=on the PDF is marked as UA-2 but
-% carries no structure for a screen reader to read. This needs TeX
-% Live 2025 or later --- on Overleaf, set it in Menu > Settings >
-% TeX Live version.
+% Tagged PDF (PDF/UA-2) accessibility setup.
 \DocumentMetadata{
   tagging=on,
   pdfversion=2.0,
@@ -215,14 +205,9 @@ and the commented-out block below it shows a figure carrying alt text.
 Both are here as worked examples; delete them along with this section
 when you start writing.
 
-% ACCESSIBILITY: every figure needs an alt= description, which is what
-% a screen reader announces in place of the image. Describe what the
-% reader is meant to take from the figure rather than naming it: "Edit
-% counts rising sharply after 2005" tells them something, "Figure 1"
-% does not. The caption is read separately, so alt text that repeats
-% the caption is wasted. For a purely decorative image, use
-% \includegraphics[artifact]{...} instead, which keeps it out of the
-% reading order entirely.
+% alt= is what a screen reader announces in place of the image. Say what
+% the reader should take from it, not what it is called. A decorative
+% image takes [artifact] instead, keeping it out of the reading order.
 %
 % \begin{figure}
 %   \centering
@@ -232,11 +217,7 @@ when you start writing.
 %   \label{fig:example}
 % \end{figure}
 
-% ACCESSIBILITY: header-rows tells the tagging code which rows are
-% headers, so their cells become TH rather than TD and a screen reader
-% can announce the column a value belongs to. Without it, a data table
-% reads as an undifferentiated grid of numbers. Set it for each table
-% that has headers; use {1,2} if two rows are headers.
+% header-rows makes the first row TH rather than TD. Use {1,2} for two.
 \tagpdfsetup{table/header-rows={1}}
 \begin{table}
   \centering
@@ -249,9 +230,8 @@ when you start writing.
   \label{tab:example}
 \end{table}
 
-% A table used only to position things on the page, rather than to
-% present data, should be marked so assistive software skips its
-% structure:  \tagpdfsetup{table/tagging=presentation}
+% A layout table, used to position rather than present, takes
+% \tagpdfsetup{table/tagging=presentation}
 
 % bibliography here
 \setcounter{biburlnumpenalty}{9001}