[meta.reflection.queries] Delete mistaken "Throws:" element.

This was added accidentally in
b679e4b because I misread the paper.

Author: tkoeppe

source/meta.tex

@@ -4839,12 +4839,6 @@
 an alias template.
 Otherwise, \tcode{false}.
 
-\pnum
-\throws
-\tcode{meta::exception} unless
-\tcode{has_template_arguments(r)} is \tcode{true}.
-\end{itemdescr}
-
 \indexlibraryglobal{template_of}%
 \begin{itemdecl}
 consteval info template_of(info r);