planning: remove kappa check in trajectory checker.

modules/planning/constraint_checker/constraint_checker.cc

@@ -55,16 +55,7 @@ bool ConstraintChecker::ValidTrajectory(
              << FLAGS_longitudinal_acceleration_upper_bound << "].";
       return false;
     }
-
-    double kappa = p.path_point().kappa();
-    if (!WithinRange(kappa, -FLAGS_kappa_bound, FLAGS_kappa_bound)) {
-      AERROR << "Kappa at relative time " << t
-             << " exceeds bound, value: " << kappa << ", bound ["
-             << -FLAGS_kappa_bound << ", " << FLAGS_kappa_bound << "].";
-      return false;
-    }
   }
-
   return true;
 }