diff --git a/components/dfs/filesystems/uffs/uffs_rtthread.c b/components/dfs/filesystems/uffs/uffs_rtthread.c
deleted file mode 100644
index 406ad35b2f..0000000000
--- a/components/dfs/filesystems/uffs/uffs_rtthread.c
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-/*
-  This file is part of UFFS, the Ultra-low-cost Flash File System.
-
-  Copyright (C) 2005-2009 Ricky Zheng <ricky_gz_zheng@yahoo.co.nz>
-
-  UFFS is free software; you can redistribute it and/or modify it under
-  the GNU Library General Public License as published by the Free Software
-  Foundation; either version 2 of the License, or (at your option) any
-  later version.
-
-  UFFS is distributed in the hope that it will be useful, but WITHOUT
-  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-  or GNU Library General Public License, as applicable, for more details.
-
-  You should have received a copy of the GNU General Public License
-  and GNU Library General Public License along with UFFS; if not, write
-  to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-  Boston, MA  02110-1301, USA.
-
-  As a special exception, if other files instantiate templates or use
-  macros or inline functions from this file, or you compile this file
-  and link it with other works to produce a work based on this file,
-  this file does not by itself cause the resulting work to be covered
-  by the GNU General Public License. However the source code for this
-  file must still be made available in accordance with section (3) of
-  the GNU General Public License v2.
-
-  This exception does not invalidate any other reasons why a work based
-  on this file might be covered by the GNU General Public License.
-*/
-
-/**
- * \file uffs_os_posix.c
- * \brief Emulation on POSIX host. This is just a dumb implementation, does not really create semaphores.
- * \author Ricky Zheng
- */
-
-#include "uffs_config.h"
-#include "uffs/uffs_os.h"
-#include "uffs/uffs_public.h"
-//#include <time.h>
-
-#define PFX "os  : "
-
-int uffs_SemCreate(OSSEM *sem)
-{
-    static int count = 0;
-    char name [RT_NAME_MAX+1];
-    struct rt_mutex *mutex = RT_NULL;
-
-    rt_snprintf(name, sizeof(name), "usem%d", count++);
-    mutex = rt_mutex_create(name, RT_IPC_FLAG_FIFO);
-    if (mutex != RT_NULL)
-    {
-        *sem = (OSSEM *)mutex;
-        return 0;
-    }
-    uffs_Perror(UFFS_MSG_SERIOUS, "can't get a semphore");
-    return -1;
-}
-
-int uffs_SemWait(OSSEM sem)
-{
-    return rt_mutex_take((struct rt_mutex *)sem, RT_WAITING_FOREVER);
-}
-
-int uffs_SemSignal(OSSEM sem)
-{
-    return rt_mutex_release((struct rt_mutex *)sem);
-}
-
-int uffs_SemDelete(OSSEM *sem)
-{
-    int ret = -1;
-
-    if (sem) {
-        ret = rt_mutex_delete((struct rt_mutex *)(*sem));
-        if (ret == RT_EOK) {
-            *sem = 0;
-        }
-    }
-    return ret;
-}
-
-int uffs_OSGetTaskId(void)
-{
-    //TODO: ... return current task ID ...
-    return 0;
-}
-
-unsigned int uffs_GetCurDateTime(void)
-{
-    // FIXME: return system time, please modify this for your platform !
-    //          or just return 0 if you don't care about file time.
-#if 0
-    time_t tvalue;
-
-    tvalue = time(NULL);
-
-    return (unsigned int)tvalue;
-#endif
-    return 0;
-}
-
-#if CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR > 0
-static void * sys_malloc(struct uffs_DeviceSt *dev, unsigned int size)
-{
-    dev = dev;
-    uffs_Perror(UFFS_MSG_NORMAL, "system memory alloc %d bytes", size);
-    return rt_malloc(size);
-}
-
-static URET sys_free(struct uffs_DeviceSt *dev, void *p)
-{
-    dev = dev;
-    rt_free(p);
-    return U_SUCC;
-}
-
-void uffs_MemSetupSystemAllocator(uffs_MemAllocator *allocator)
-{
-    allocator->malloc = sys_malloc;
-    allocator->free = sys_free;
-}
-#endif
-
-#if !defined(RT_THREAD)
-/* debug message output throught 'printf' */
-static void output_dbg_msg(const char *msg);
-static struct uffs_DebugMsgOutputSt m_dbg_ops = {
-    output_dbg_msg,
-    NULL,
-};
-
-static void output_dbg_msg(const char *msg)
-{
-    rt_kprintf("%s", msg);
-}
-
-void uffs_SetupDebugOutput(void)
-{
-    uffs_InitDebugMessageOutput(&m_dbg_ops, UFFS_MSG_NOISY);
-}
-#else
-
-void uffs_SetupDebugOutput(void)
-{
-}
-#endif