Revert "fix transfer cache thread_local bug (#14581)"

This reverts commit 5c073a4.

Author: Superjomn

paddle/fluid/framework/transfer_scope_cache.cc

@@ -17,28 +17,16 @@
 namespace paddle {
 namespace framework {
 
-// Holds all the transfer scope across the process.
 std::unordered_map<size_t, Scope*>& global_transfer_data_cache() {
-  typedef std::unordered_map<size_t, Scope*> map_t;
-  thread_local std::unique_ptr<map_t> x(new map_t);
+  thread_local auto* x = new std::unordered_map<size_t, Scope*>;
   return *x;
 }
 
-// Holds all the transfer scope for this thread.
 std::unordered_set<Scope*>& global_transfer_scope_cache() {
-  typedef std::unordered_set<Scope*> set_t;
-  thread_local std::unique_ptr<set_t> x(new set_t);
+  thread_local auto* x = new std::unordered_set<Scope*>;
   return *x;
 }
 
-// Try to create a transfer scope. If one cached scope has match the
-// requirement, just return that one.
-// Inputs:
-// @type0: the source kernel type.
-// @type1: the target kernel type.
-// @scope: the execution scope of this op.
-// Returns: A scope used to hold the transfer data across the different kernel
-// type.
 Scope* TryCreateTransferScope(OpKernelType type0, OpKernelType type1,
                               const Scope* scope) {
   Scope* new_scope{nullptr};
@@ -58,5 +46,27 @@ Scope* TryCreateTransferScope(OpKernelType type0, OpKernelType type1,
   return new_scope;
 }
 
+void RemoveKidsFromTransferScopeCache(Scope* scope) {
+  auto it = global_transfer_scope_cache().find(scope);
+  if (it != global_transfer_scope_cache().end()) {
+    global_transfer_scope_cache().erase(it);
+  }
+  for (auto* s : scope->kids()) {
+    auto it = global_transfer_scope_cache().find(s);
+    if (it != global_transfer_scope_cache().end()) {
+      global_transfer_scope_cache().erase(it);
+    }
+  }
+
+  // remove global transfer data cache
+  auto& cache = global_transfer_data_cache();
+  for (auto it = cache.begin(); it != cache.end();) {
+    if (it->second == scope)
+      it = cache.erase(it);
+    else
+      it++;
+  }
+}
+
 }  // namespace framework
 }  // namespace paddle