[native] Remove unused includes.

Author: amitkdutta

presto-native-execution/presto_cpp/main/PeriodicTaskManager.h

@@ -16,7 +16,6 @@
 #include <folly/experimental/FunctionScheduler.h>
 #include <folly/executors/ThreadedRepeatingFunctionRunner.h>
 #include "velox/common/memory/Memory.h"
-#include "velox/exec/Task.h"
 
 namespace folly {
 class CPUThreadPoolExecutor;

presto-native-execution/presto_cpp/main/PrestoServer.cpp

@@ -46,10 +46,8 @@
 #include "velox/common/caching/CacheTTLController.h"
 #include "velox/common/caching/SsdCache.h"
 #include "velox/common/file/FileSystems.h"
-#include "velox/common/memory/MmapAllocator.h"
 #include "velox/common/memory/SharedArbitrator.h"
 #include "velox/connectors/Connector.h"
-#include "velox/connectors/hive/HiveDataSink.h"
 #include "velox/connectors/hive/storage_adapters/abfs/RegisterAbfsFileSystem.h"
 #include "velox/connectors/hive/storage_adapters/gcs/RegisterGcsFileSystem.h"
 #include "velox/connectors/hive/storage_adapters/hdfs/RegisterHdfsFileSystem.h"