[nrf fromlist] drivers: nrfwifi: Remove passing unused flag

This flag is now unused in OSAL as it takes the input via the API.

Upstream PR #: 80328

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

drivers/wifi/nrfwifi/CMakeLists.txt

@@ -307,7 +307,6 @@ zephyr_compile_definitions(
   -DNRF70_RX_MAX_DATA_SIZE=${CONFIG_NRF70_RX_MAX_DATA_SIZE}
   -DNRF70_MAX_TX_PENDING_QLEN=${CONFIG_NRF70_MAX_TX_PENDING_QLEN}
   -DNRF70_RPU_PS_IDLE_TIMEOUT_MS=${CONFIG_NRF70_RPU_PS_IDLE_TIMEOUT_MS}
-  -DNRF70_REG_DOMAIN=${CONFIG_NRF70_REG_DOMAIN}
   -DNRF70_BAND_2G_LOWER_EDGE_BACKOFF_DSSS=${CONFIG_NRF70_BAND_2G_LOWER_EDGE_BACKOFF_DSSS}
   -DNRF70_BAND_2G_LOWER_EDGE_BACKOFF_HT=${CONFIG_NRF70_BAND_2G_LOWER_EDGE_BACKOFF_HT}
   -DNRF70_BAND_2G_LOWER_EDGE_BACKOFF_HE=${CONFIG_NRF70_BAND_2G_LOWER_EDGE_BACKOFF_HE}