diff --git a/ports/atmel-samd/boards/feather_m0_express/mpconfigboard.mk b/ports/atmel-samd/boards/feather_m0_express/mpconfigboard.mk
index b9643cb74b..03a89f5f5d 100644
--- a/ports/atmel-samd/boards/feather_m0_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/feather_m0_express/mpconfigboard.mk
@@ -12,9 +12,4 @@ LONGINT_IMPL = MPZ
 CHIP_VARIANT = SAMD21G18A
 CHIP_FAMILY = samd21
 
-CFLAGS_INLINE_LIMIT = 70
-
-CIRCUITPY_NETWORK = 1
-MICROPY_PY_WIZNET5K = 5500
-
 CIRCUITPY_FREQUENCYIO = 0
diff --git a/ports/atmel-samd/boards/metro_m0_express/mpconfigboard.mk b/ports/atmel-samd/boards/metro_m0_express/mpconfigboard.mk
index b23a8b76e8..5104b601b8 100644
--- a/ports/atmel-samd/boards/metro_m0_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/metro_m0_express/mpconfigboard.mk
@@ -13,9 +13,4 @@ LONGINT_IMPL = MPZ
 CHIP_VARIANT = SAMD21G18A
 CHIP_FAMILY = samd21
 
-CFLAGS_INLINE_LIMIT = 70
-
-CIRCUITPY_NETWORK = 1
-MICROPY_PY_WIZNET5K = 5500
-
 CIRCUITPY_FREQUENCYIO = 0