fix TraceEventCollector namespace (#51782)

paddle/phi/backends/device_base.h

@@ -19,15 +19,9 @@
 #include "paddle/phi/backends/event.h"
 #include "paddle/phi/backends/stream.h"
 
-#include "paddle/phi/api/profiler/trace_event_collector.h"
+namespace phi {
 
-namespace paddle {
-namespace platform {
 class TraceEventCollector;
-}  // namespace platform
-}  // namespace paddle
-
-namespace phi {
 
 class DeviceInterface {  // Driver / Runtime
  public: