diff --git a/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/mpconfigboard.cmake b/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/mpconfigboard.cmake
index 4ed9173207..cbfed3e6a1 100644
--- a/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/mpconfigboard.cmake
+++ b/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/mpconfigboard.cmake
@@ -1,5 +1 @@
 # cmake file for Pololu Zumo 2040 Robot
-
-# This board is not yet in upstream pico-sdk, so define it here
-# See also: https://github.com/raspberrypi/pico-sdk/tree/master/src/boards/include/boards
-list(APPEND PICO_BOARD_HEADER_DIRS ${MICROPY_BOARD_DIR})
diff --git a/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/pololu_zumo_2040_robot.h b/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/pololu_zumo_2040_robot.h
deleted file mode 100644
index 252cea981b..0000000000
--- a/ports/rp2/boards/POLOLU_ZUMO_2040_ROBOT/pololu_zumo_2040_robot.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (c) 2023 Raspberry Pi (Trading) Ltd.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-// -----------------------------------------------------
-// NOTE: THIS HEADER IS ALSO INCLUDED BY ASSEMBLER SO
-//       SHOULD ONLY CONSIST OF PREPROCESSOR DIRECTIVES
-// -----------------------------------------------------
-
-#ifndef _POLOLU_ZUMO_2040_ROBOT_H
-#define _POLOLU_ZUMO_2040_ROBOT_H
-
-// For board detection
-#define POLOLU_ZUMO_2040_ROBOT
-
-#define PICO_DEFAULT_LED_PIN 25
-#define PICO_BOOT_STAGE2_CHOOSE_W25Q080 1
-#define PICO_FLASH_SPI_CLKDIV 2
-#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
-
-// All boards have at least the B1 revision
-#define PICO_RP2040_B0_SUPPORTED 0
-
-#endif