kernel: cleanup header inclusion

Remove unused header inclusion in kernel code.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

kernel/mutex.c

@@ -29,16 +29,15 @@
 #include <kernel.h>
 #include <kernel_structs.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <ksched.h>
 #include <wait_q.h>
-#include <sys/dlist.h>
-#include <debug/object_tracing_common.h>
 #include <errno.h>
 #include <init.h>
 #include <syscall_handler.h>
+#include <debug/object_tracing_common.h>
 #include <tracing/tracing.h>
 #include <sys/check.h>
+#include <logging/log.h>
 LOG_MODULE_DECLARE(os);
 
 /* We use a global spinlock here because some of the synchronization

kernel/pipes.c

@@ -14,10 +14,8 @@
 #include <kernel_structs.h>
 #include <debug/object_tracing_common.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <ksched.h>
 #include <wait_q.h>
-#include <sys/dlist.h>
 #include <init.h>
 #include <syscall_handler.h>
 #include <kernel_internal.h>

kernel/poll.c

@@ -20,7 +20,6 @@
 #include <wait_q.h>
 #include <ksched.h>
 #include <syscall_handler.h>
-#include <sys/slist.h>
 #include <sys/dlist.h>
 #include <sys/util.h>
 #include <sys/__assert.h>

kernel/queue.c

@@ -15,10 +15,8 @@
 #include <kernel_structs.h>
 #include <debug/object_tracing_common.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <wait_q.h>
 #include <ksched.h>
-#include <sys/sflist.h>
 #include <init.h>
 #include <syscall_handler.h>
 #include <kernel_internal.h>

kernel/sem.c

@@ -21,7 +21,6 @@
 #include <kernel_structs.h>
 #include <debug/object_tracing_common.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <wait_q.h>
 #include <sys/dlist.h>
 #include <ksched.h>

kernel/stack.c

@@ -12,7 +12,6 @@
 #include <kernel_structs.h>
 #include <debug/object_tracing_common.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <ksched.h>
 #include <wait_q.h>
 #include <sys/check.h>

kernel/thread.c

@@ -15,10 +15,8 @@
 #include <spinlock.h>
 #include <sys/math_extras.h>
 #include <sys_clock.h>
-#include <drivers/timer/system_timer.h>
 #include <ksched.h>
 #include <wait_q.h>
-#include <sys/atomic.h>
 #include <syscall_handler.h>
 #include <kernel_internal.h>
 #include <kswap.h>