diff --git a/boards/sim/sim/sim/src/CMakeLists.txt b/boards/sim/sim/sim/src/CMakeLists.txt
index cbf3cc7168c..590f08d4628 100644
--- a/boards/sim/sim/sim/src/CMakeLists.txt
+++ b/boards/sim/sim/sim/src/CMakeLists.txt
@@ -26,10 +26,6 @@ if(CONFIG_BOARD_LATE_INITIALIZE)
   list(APPEND SRCS sim_boot.c)
 endif()
 
-if(CONFIG_BOARDCTL)
-  list(APPEND SRCS sim_appinit.c)
-endif()
-
 if(CONFIG_BOARD_LATE_INITIALIZE)
   list(APPEND SRCS sim_bringup.c)
   if(CONFIG_LIBC_ZONEINFO_ROMFS)
diff --git a/boards/sim/sim/sim/src/Makefile b/boards/sim/sim/sim/src/Makefile
index 6fe51cd401e..168d9022e0c 100644
--- a/boards/sim/sim/sim/src/Makefile
+++ b/boards/sim/sim/sim/src/Makefile
@@ -30,10 +30,6 @@ ifeq ($(CONFIG_BOARD_LATE_INITIALIZE),y)
   CSRCS += sim_boot.c
 endif
 
-ifeq ($(CONFIG_BOARDCTL),y)
-  CSRCS += sim_appinit.c
-endif
-
 ifeq ($(CONFIG_BOARD_LATE_INITIALIZE),y)
   CSRCS += sim_bringup.c
 ifeq ($(CONFIG_LIBC_ZONEINFO_ROMFS),y)
diff --git a/boards/sim/sim/sim/src/sim_appinit.c b/boards/sim/sim/sim/src/sim_appinit.c
deleted file mode 100644
index f4208a663be..00000000000
--- a/boards/sim/sim/sim/src/sim_appinit.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/****************************************************************************
- * boards/sim/sim/sim/src/sim_appinit.c
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.  The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-#include <nuttx/board.h>
-
-#include "sim.h"
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: board_app_initialize
- *
- * Description:
- *   Perform application specific initialization.  This function is never
- *   called directly from application code, but only indirectly via the
- *   (non-standard) boardctl() interface using the command BOARDIOC_INIT.
- *
- * Input Parameters:
- *   arg - The boardctl() argument is passed to the board_app_initialize()
- *         implementation without modification.  The argument has no
- *         meaning to NuttX; the meaning of the argument is a contract
- *         between the board-specific initialization logic and the
- *         matching application logic.  The value could be such things as a
- *         mode enumeration value, a set of DIP switch switch settings, a
- *         pointer to configuration data read from a file or serial FLASH,
- *         or whatever you would like to do with it.  Every implementation
- *         should accept zero/NULL as a default configuration.
- *
- * Returned Value:
- *   Zero (OK) is returned on success; a negated errno value is returned on
- *   any failure to indicate the nature of the failure.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_BOARDCTL
-int board_app_initialize(uintptr_t arg)
-{
-#ifndef CONFIG_BOARD_LATE_INITIALIZE
-  sim_bringup();
-#endif
-
-  return 0;
-}
-#endif /* CONFIG_BOARDCTL */
diff --git a/boards/sim/sim/sim/src/sim_foc.c b/boards/sim/sim/sim/src/sim_foc.c
index 1e0095c8b0c..d46a139fb7c 100644
--- a/boards/sim/sim/sim/src/sim_foc.c
+++ b/boards/sim/sim/sim/src/sim_foc.c
@@ -70,8 +70,6 @@ static void sim_foc_interrupt(wdparm_t arg)
  * Description:
  *   Initialize the FOC device.
  *
- *   This function should be call by board_app_initialize().
- *
  * Returned Value:
  *   0 on success, a negated errno value on failure
  *