move memcpy.h into cc file (#39469)

paddle/pten/core/selected_rows.cc

@@ -13,8 +13,12 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/pten/core/selected_rows.h"
+
 #include "paddle/pten/core/utils/data_type.h"
 
+// See Note [ Why still include the fluid headers? ]
+#include "paddle/fluid/memory/memcpy.h"
+
 namespace pten {
 
 struct ReAllocateVisitor {

paddle/pten/core/selected_rows.h

@@ -29,7 +29,6 @@ limitations under the License. */
 
 // See Note [ Why still include the fluid headers? ]
 #include "paddle/fluid/framework/mixed_vector.h"
-#include "paddle/fluid/memory/memcpy.h"
 
 namespace egr {
 class EagerTensor;