change(esp_hw_support): some system peripherals to use a retention module number

components/esp_hw_support/include/esp_private/sleep_sys_periph.h

@@ -29,15 +29,6 @@ extern "C" {
  */
 bool peripheral_domain_pd_allowed(void);
 
-/**
- * @brief Digital peripheral power down initialize
- *
- * @return ESP_OK on success
- *         ESP_ERR_INVALID_ARG on invalid sleep_retention_entries_create args
- *         No memory for the retention link
- */
-void sleep_sys_periph_retention_init(void);
-
 #ifdef __cplusplus
 }
 #endif