rename needs_subst to has_param

compiler/rustc_trait_selection/src/traits/select/mod.rs

@@ -1000,7 +1000,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
     ) -> Result<EvaluationResult, OverflowError> {
         if !self.is_intercrate()
             && obligation.is_global()
-            && obligation.param_env.caller_bounds().iter().all(|bound| bound.needs_subst())
+            && obligation.param_env.caller_bounds().iter().all(|bound| bound.has_param())
         {
             // If a param env has no global bounds, global obligations do not
             // depend on its particular value in order to work, so we can clear