Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: asukaminato0721

pyrefly/lib/alt/class/pydantic.rs

@@ -556,9 +556,6 @@ impl<'a, Ans: LookupAnswer> AnswersSolver<'a, Ans> {
         else {
             return;
         };
-        if constraints.is_empty() {
-            return;
-        }
 
         let infer_errors = self.error_swallower();
         let mut positional_index = 0;