app_update: Don't double-verify secure boot signature during OTA

esp_image_load() already verifies the signature

components/app_update/esp_ota_ops.c

@@ -240,14 +240,6 @@ esp_err_t esp_ota_end(esp_ota_handle_t handle)
         goto cleanup;
     }
 
-#ifdef CONFIG_SECURE_BOOT_ENABLED
-    ret = esp_secure_boot_verify_signature(it->part->address, data.image_len);
-    if (ret != ESP_OK) {
-        ret = ESP_ERR_OTA_VALIDATE_FAILED;
-        goto cleanup;
-    }
-#endif
-
  cleanup:
     LIST_REMOVE(it, entries);
     free(it);