diff --git a/ports/esp32/boards/GENERIC_OTA/sdkconfig.board b/ports/esp32/boards/GENERIC_OTA/sdkconfig.board
index ca1f4276f4..d314860cc9 100644
--- a/ports/esp32/boards/GENERIC_OTA/sdkconfig.board
+++ b/ports/esp32/boards/GENERIC_OTA/sdkconfig.board
@@ -1,6 +1,3 @@
 CONFIG_BOOTLOADER_APP_ROLLBACK_ENABLE=y
 CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions-ota.csv"
-
-# ESP-IDF v3:
-CONFIG_APP_ROLLBACK_ENABLE=y
diff --git a/ports/esp32/boards/sdkconfig.base b/ports/esp32/boards/sdkconfig.base
index de6e42c8f3..e326831a15 100644
--- a/ports/esp32/boards/sdkconfig.base
+++ b/ports/esp32/boards/sdkconfig.base
@@ -41,17 +41,6 @@ CONFIG_MBEDTLS_ASYMMETRIC_CONTENT_LEN=y
 # ULP coprocessor support
 CONFIG_ESP32_ULP_COPROC_ENABLED=y
 
-# v3.3-only (renamed in 4.0)
-CONFIG_LOG_BOOTLOADER_LEVEL_WARN=y
-CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU0=n
-CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU1=n
-CONFIG_SUPPORT_STATIC_ALLOCATION=y
-CONFIG_ENABLE_STATIC_TASK_CLEAN_UP_HOOK=y
-CONFIG_PPP_SUPPORT=y
-CONFIG_PPP_PAP_SUPPORT=y
-CONFIG_PPP_CHAP_SUPPORT=y
-CONFIG_ULP_COPROC_ENABLED=y
-
 # For cmake build
 CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
 CONFIG_PARTITION_TABLE_CUSTOM=y
diff --git a/ports/esp32/boards/sdkconfig.ble b/ports/esp32/boards/sdkconfig.ble
index f714ce4629..5565fd81a8 100644
--- a/ports/esp32/boards/sdkconfig.ble
+++ b/ports/esp32/boards/sdkconfig.ble
@@ -15,13 +15,3 @@ CONFIG_BT_NIMBLE_MAX_CONNECTIONS=4
 CONFIG_BT_NIMBLE_PINNED_TO_CORE_0=y
 CONFIG_BT_NIMBLE_PINNED_TO_CORE_1=n
 CONFIG_BT_NIMBLE_PINNED_TO_CORE=0
-
-# v3.3-only (renamed in 4.0)
-CONFIG_BTDM_CONTROLLER_MODE_BLE_ONLY=y
-CONFIG_BTDM_CONTROLLER_MODE_BR_EDR_ONLY=
-CONFIG_BTDM_CONTROLLER_MODE_BTDM=
-CONFIG_BLUEDROID_ENABLED=n
-CONFIG_NIMBLE_ENABLED=y
-CONFIG_NIMBLE_MAX_CONNECTIONS=4
-CONFIG_NIMBLE_PINNED_TO_CORE_0=n
-CONFIG_NIMBLE_PINNED_TO_CORE_1=y
diff --git a/ports/esp32/boards/sdkconfig.spiram b/ports/esp32/boards/sdkconfig.spiram
index db1a83af8c..5b4ce118b8 100644
--- a/ports/esp32/boards/sdkconfig.spiram
+++ b/ports/esp32/boards/sdkconfig.spiram
@@ -4,6 +4,3 @@ CONFIG_ESP32_SPIRAM_SUPPORT=y
 CONFIG_SPIRAM_CACHE_WORKAROUND=y
 CONFIG_SPIRAM_IGNORE_NOTFOUND=y
 CONFIG_SPIRAM_USE_MEMMAP=y
-
-# v3.3-only (renamed in 4.0)
-CONFIG_SPIRAM_SUPPORT=y