Do not use biblatex-jura2’s sorting template

Instead, use biblatex’s upstream nty template, which is more fit.

jurafoo.sty

@@ -120,6 +120,35 @@
 \renewcommand*{\newunitpunct}{\addcomma\space}
 % Global: Print all names in reverse order
 \DeclareNameAlias{default}{sortname}
+% Global: Do not use biblatex-jura2’s sorting template
+\DeclareSortingTemplate{nty}{
+ \sort{
+  \field{presort}
+ }
+ \sort[final]{
+  \field{sortkey}
+ }
+ \sort{
+  \field{sortname}
+  \field{author}
+  \field{editor}
+  \field{translator}
+  \field{sorttitle}
+  \field{title}
+ }
+ \sort{
+  \field{sorttitle}
+  \field{title}
+ }
+ \sort{
+  \field{sortyear}
+  \field{year}
+ }
+ \sort{
+  \field{volume}
+  \literal{0}
+ }
+}
 
 % Commentary (citedbytitle): Don’t print title in italic (upstream doesn’t know themselves?)
 \DeclareFieldFormat[commentary]{maintitle}{\normalfont{#1}}