design/tpl: Remove now-unused listing package

All XML appears within the context of equations now.

design/tpl/sec/class.tex

@@ -632,7 +632,7 @@ We therefore establish a relationship to the notation of linear algebra
 \begin{remark}[Logical Connectives With Matrix Notation]
   From the definition of \axmref{class-mat-not},
     it should be clear that the logical connective $\monoidop$ necessarily
-    acts like a Hadamard product with regards to how individual elements are
+    acts like a Hadamard product with respect to how individual elements are
     combined.
 \end{remark}
 

design/tpl/tpl.sty

@@ -17,7 +17,6 @@
             linkcolor=href,
             draft=false]{hyperref}       % Hyperlinks (even in draft mode)
 \usepackage{xcolor}                      % Colors (for hyperlinks)
-\usepackage[final]{listings}             % Displaying code (even in draft)
 \usepackage{amsmath,amsthm}              % AMS macros, including theorems
 \usepackage{suffix}                      % To aid in defining star macros
 \usepackage{marginnote}                  % Notes in the margin
@@ -36,19 +35,6 @@
 
 
 
-%%
-% Listing language
-%%
-\lstset{
-  language=XML,
-  basicstyle=\ttfamily,
-  columns=fullflexible,
-  keepspaces=true,
-  showstringspaces=false,
-}
-
-
-
 %%
 % Common typesetting
 %%