[memory-infra] Remove thread check blacklist

base/trace_event/memory_dump_manager.h

Index: base/trace_event/memory_dump_manager.h
diff --git a/base/trace_event/memory_dump_manager.h b/base/trace_event/memory_dump_manager.h
index 8cf8cd75a435634b2801ae34c080a9fab762d20e..03192bfa91efd9521ee335755c46a61ec668d278 100644
--- a/base/trace_event/memory_dump_manager.h
+++ b/base/trace_event/memory_dump_manager.h
@@ -295,11 +295,6 @@ class BASE_EXPORT MemoryDumpManager {
   // Shared among all the PMDs to keep state scoped to the tracing session.
   scoped_refptr<MemoryDumpSessionState> session_state_;
 
-  // The list of names of dump providers that are blacklisted from strict thread
-  // affinity check on unregistration.
-  std::unordered_set<StringPiece, StringPieceHash>
-      strict_thread_check_blacklist_;
-
   std::unique_ptr<MemoryTracingObserver> tracing_observer_;
 
   // Function provided by the embedder to handle global dump requests.