diff --git a/sched/wqueue/kwork_lpthread.c b/sched/wqueue/kwork_lpthread.c
deleted file mode 100644
index 611c8c61c92..00000000000
--- a/sched/wqueue/kwork_lpthread.c
+++ /dev/null
@@ -1,170 +0,0 @@
-/****************************************************************************
- * sched/wqueue/kwork_lpthread.c
- *
- * 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 <unistd.h>
-#include <sched.h>
-#include <string.h>
-#include <errno.h>
-#include <queue.h>
-#include <debug.h>
-
-#include <nuttx/wqueue.h>
-#include <nuttx/kthread.h>
-#include <nuttx/kmalloc.h>
-#include <nuttx/clock.h>
-
-#include "wqueue/wqueue.h"
-
-#ifdef CONFIG_SCHED_LPWORK
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/* The state of the kernel mode, low priority work queue(s). */
-
-struct lp_wqueue_s g_lpwork;
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: work_lpthread
- *
- * Description:
- *   These are the worker thread(s) that performs the actions placed on the
- *   low priority work queue.
- *
- *   These, along with the higher priority worker thread are the kernel mode
- *   work queues (also build in the flat build).
- *
- *   All kernel mode worker threads are started by the OS during normal
- *   bring up.  This entry point is referenced by OS internally and should
- *   not be accessed by application logic.
- *
- * Input Parameters:
- *   argc, argv (not used)
- *
- * Returned Value:
- *   Does not return
- *
- ****************************************************************************/
-
-static int work_lpthread(int argc, char *argv[])
-{
-  int wndx = 0;
-#if CONFIG_SCHED_LPNTHREADS > 1
-  pid_t me = getpid();
-  int i;
-
-  /* Find out thread index by search the workers in g_lpwork */
-
-  for (wndx = 0, i = 0; i < CONFIG_SCHED_LPNTHREADS; i++)
-    {
-      if (g_lpwork.worker[i].pid == me)
-        {
-          wndx = i;
-          break;
-        }
-    }
-
-  DEBUGASSERT(i < CONFIG_SCHED_LPNTHREADS);
-#endif
-
-  /* Loop forever */
-
-  for (; ; )
-    {
-      /* Then process queued work.  work_process will not return until:
-       * (1) there is no further work in the work queue, and (2) signal is
-       * triggered, or delayed work expires.
-       */
-
-      work_process((FAR struct kwork_wqueue_s *)&g_lpwork, wndx);
-    }
-
-  return OK; /* To keep some compilers happy */
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: work_start_lowpri
- *
- * Description:
- *   Start the low-priority, kernel-mode worker thread(s)
- *
- * Input Parameters:
- *   None
- *
- * Returned Value:
- *   The task ID of the worker thread is returned on success.  A negated
- *   errno value is returned on failure.
- *
- ****************************************************************************/
-
-int work_start_lowpri(void)
-{
-  pid_t pid;
-  int wndx;
-
-  /* Don't permit any of the threads to run until we have fully initialized
-   * g_lpwork.
-   */
-
-  sched_lock();
-
-  /* Start the low-priority, kernel mode worker thread(s) */
-
-  sinfo("Starting low-priority kernel worker thread(s)\n");
-
-  for (wndx = 0; wndx < CONFIG_SCHED_LPNTHREADS; wndx++)
-    {
-      pid = kthread_create(LPWORKNAME, CONFIG_SCHED_LPWORKPRIORITY,
-                           CONFIG_SCHED_LPWORKSTACKSIZE,
-                           (main_t)work_lpthread,
-                           (FAR char * const *)NULL);
-
-      DEBUGASSERT(pid > 0);
-      if (pid < 0)
-        {
-          serr("ERROR: kthread_create %d failed: %d\n", wndx, (int)pid);
-          sched_unlock();
-          return (int)pid;
-        }
-
-      g_lpwork.worker[wndx].pid  = pid;
-      g_lpwork.worker[wndx].busy = true;
-    }
-
-  sched_unlock();
-  return g_lpwork.worker[0].pid;
-}
-
-#endif /* CONFIG_SCHED_LPWORK */