xso-proc: remove Span information from generated type names

By removing that, the lint won't trigger for identifiers with trailing
underscores (which become then embedded underscores which normally trips
the `non_camel_case_types` lint).

parsers/src/util/macro_tests.rs

@@ -611,6 +611,9 @@ fn renamed_types_get_renamed() {
     assert!(std::mem::size_of::<RenamedIter>() >= 0);
 }
 
+// What is this, you may wonder?
+// This is a test that any generated type names won't trigger
+// the `non_camel_case_types` lint.
 #[derive(FromXml, AsXml, PartialEq, Debug, Clone)]
 #[xml(namespace = NS1, name = "elem")]
-struct Foo_;
+struct LintTest_;