used better condition for checking intrinsics

Author: vayunbiyani

compiler/rustc_passes/src/liveness.rs

@@ -1521,18 +1521,12 @@ impl<'tcx> Liveness<'_, 'tcx> {
     }
 
     fn warn_about_unused_args(&self, body: &hir::Body<'_>, entry_ln: LiveNode) {
-        let is_intrinsic_with_no_body = self.ir.tcx.intrinsic(body.value.hir_id.owner.def_id)?.must_be_overridden();
-
-        if is_intrinsic {
-            let has_body = match &body.value.kind {
-                rustc_hir::ExprKind::Block(block, _) => !block.stmts.is_empty() || block.expr.is_some(),
-                _ => false,
-            };
-            if has_body {
+        if let Some(intrinsic) = self.ir.tcx.intrinsic(body.value.hir_id.owner.def_id) {
+            if intrinsic.must_be_overridden {
                 return;
             }
         }
-        
+
         for p in body.params {
             self.check_unused_vars_in_pat(
                 p.pat,