[NFC] Remove <stdatomic.h> as unused (#5063)

Signed-off-by: Anatoly Myachev <[email protected]>

Author: anmyachev

third_party/nvidia/backend/driver.c

@@ -3,7 +3,6 @@
 #include <stdbool.h>
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
-#include <stdatomic.h>
 
 // Raises a Python exception and returns false if code is not CUDA_SUCCESS.
 static bool gpuAssert(CUresult code, const char *file, int line) {