diff --git a/clang-tools-extra/clang-tidy/concurrency/AsyncBlockingCheck.cpp b/clang-tools-extra/clang-tidy/concurrency/AsyncBlockingCheck.cpp
--- a/clang-tools-extra/clang-tidy/concurrency/AsyncBlockingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/concurrency/AsyncBlockingCheck.cpp
@@ -314,12 +314,6 @@
     }
   }
 
-  const auto *L = Result.Nodes.getNodeAs<NestedNameSpecifierLoc>("lock");
-  if (L) {
-    diag(L->getBeginLoc(), "type may sleep and is not coroutine-safe")
-        << SourceRange(L->getBeginLoc(), L->getEndLoc());
-  }
-
   const auto *Atomic = Result.Nodes.getNodeAs<ValueDecl>(kAtomic);
   if (Atomic) {
     const auto *Lockfree = Result.Nodes.getNodeAs<VarDecl>(kLockfree);