[lldb] Use std::none_of (NFC) (#143319)

Author: kazutakahirata

lldb/source/Utility/Listener.cpp

@@ -352,8 +352,7 @@ Listener::StartListeningForEventSpec(const BroadcasterManagerSP &manager_sp,
       this->shared_from_this(), event_spec);
   if (bits_acquired) {
     BroadcasterManagerWP manager_wp(manager_sp);
-    auto iter = llvm::find_if(m_broadcaster_managers, manager_matcher);
-    if (iter == m_broadcaster_managers.end())
+    if (llvm::none_of(m_broadcaster_managers, manager_matcher))
       m_broadcaster_managers.push_back(manager_wp);
   }