feat: remove RT_USING_SCHED_THREAD_CTX

Prepare for the next release by removing the compatible codes for v5.1.0
and before.

Changes:

- Remove the compatible macros and Kconfig options for the old struct
  rt_thread layout.

Signed-off-by: Shell <smokewood@qq.com>

include/rtsched.h

@@ -1,11 +1,11 @@
 /*
- * Copyright (c) 2023-2024 RT-Thread Development Team
+ * Copyright (c) 2023-2024, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
- * 2024-01-19     Shell        Seperate schduling statements from rt_thread_t
+ * 2024-01-19     Shell        Separate scheduling statements from rt_thread_t
  *                             to rt_sched_thread_ctx. Add definitions of scheduler.
  */
 #ifndef __RT_SCHED_H__
@@ -22,8 +22,6 @@ struct rt_thread;
 
 typedef rt_uint8_t rt_sched_thread_status_t;
 
-#ifdef RT_USING_SCHED_THREAD_CTX
-
 /**
  * Scheduler private status binding on thread. Caller should never accessing
  * these members.
@@ -85,43 +83,6 @@ struct rt_sched_thread_ctx
         struct rt_thread, sched_thread_ctx)
 #define RT_THREAD_LIST_NODE(thread) (RT_SCHED_CTX(thread).thread_list_node)
 
-#else /* !defined(RT_USING_SCHED_THREAD_CTX) */
-
-#if RT_THREAD_PRIORITY_MAX > 32
-#define _RT_SCHED_THREAD_CTX_PRIO_EXT                 \
-    rt_uint8_t number;    /**< priority low number */ \
-    rt_uint8_t high_mask; /**< priority high mask */
-
-#else /* ! RT_THREAD_PRIORITY_MAX > 32 */
-
-#define _RT_SCHED_THREAD_CTX_PRIO_EXT
-#endif /* RT_THREAD_PRIORITY_MAX > 32 */
-
-#define RT_SCHED_THREAD_CTX                                                    \
-    rt_list_t tlist;                    /**< node in thread list */            \
-    rt_uint8_t stat;                    /**< thread status */                  \
-    rt_uint8_t sched_flag_locked:1;                                            \
-            /**< calling thread have the scheduler locked */                   \
-    rt_uint8_t sched_flag_ttmr_set:1;   /**< thread timer is start */          \
-    rt_tick_t init_tick;                /**< thread's initialized tick */      \
-    rt_tick_t remaining_tick;           /**< remaining tick */                 \
-    rt_uint8_t current_priority;        /**< current priority */               \
-    rt_uint8_t init_priority;           /**< initialized priority */           \
-    _RT_SCHED_THREAD_CTX_PRIO_EXT                                              \
-    rt_uint32_t number_mask;            /**< priority number mask */
-
-#define RT_SCHED_PRIV(thread) (*thread)
-#define RT_SCHED_CTX(thread) (*thread)
-
-/**
- * Convert a list node in container RT_SCHED_CTX(thread)->thread_list_node
- * to a thread pointer.
- */
-#define RT_THREAD_LIST_NODE_ENTRY(node) rt_list_entry((node), struct rt_thread, tlist)
-#define RT_THREAD_LIST_NODE(thread) (RT_SCHED_CTX(thread).tlist)
-
-#endif /* RT_USING_SCHED_THREAD_CTX */
-
 /**
  * System Scheduler Locking
  */

src/Kconfig

@@ -69,7 +69,6 @@ config RT_USING_AMP
 config RT_USING_SMP
     bool "Enable SMP (Symmetric multiprocessing)"
     default n
-    select RT_USING_SCHED_THREAD_CTX
     help
         This option should be selected by machines which have an SMP-
         capable CPU.
@@ -450,14 +449,6 @@ config RT_USING_THREADSAFE_PRINTF
     bool "Enable thread safe kernel print service"
     default y if RT_USING_SMP && RT_USING_SMART
 
-config RT_USING_SCHED_THREAD_CTX
-    bool "Using the scheduler thread context"
-    help
-        Using the scheduler thread context embedded in the thread object.
-        This options is only for backward compatible codes. Maybe use as a
-        mandatory option in the future.
-    default y if RT_USING_SMP
-
 config RT_USING_CONSOLE
     bool "Using console for rt_kprintf"
     default y