Fix: List Style still shown in Nodes

The Theme Space List was removed in 19c15e0218 but accidently
reintroduced again when adding the compositor asset shelf in
0a0dd4ca37, most likely while solving merge conflicts.

Pull Request: https://projects.blender.org/blender/blender/pulls/145098

source/blender/makesrna/intern/rna_userdef.cc

@@ -3296,7 +3296,6 @@ static void rna_def_userdef_theme_space_node(BlenderRNA *brna)
 
   rna_def_userdef_theme_spaces_main(srna);
   rna_def_userdef_theme_spaces_region_main(srna);
-  rna_def_userdef_theme_spaces_list_main(srna);
 
   prop = RNA_def_property(srna, "grid", PROP_FLOAT, PROP_COLOR_GAMMA);
   RNA_def_property_array(prop, 3);