Kernel/Thread: move thread queue, current thread, and scheduling related function into the manager

As we touched it, remove IPC::GetCommandBuffer

src/core/hle/ipc.h

@@ -9,27 +9,6 @@
 #include "core/hle/kernel/thread.h"
 #include "core/memory.h"
 
-namespace Kernel {
-
-/// Offset into command buffer of header
-static const int kCommandHeaderOffset = 0x80;
-
-/**
- * Returns a pointer to the command buffer in the current thread's TLS
- * TODO(Subv): This is not entirely correct, the command buffer should be copied from
- * the thread's TLS to an intermediate buffer in kernel memory, and then copied again to
- * the service handler process' memory.
- * @param offset Optional offset into command buffer
- * @param offset Optional offset into command buffer (in bytes)
- * @return Pointer to command buffer
- */
-inline u32* GetCommandBuffer(const int offset = 0) {
-    return (u32*)Memory::GetPointer(GetCurrentThread()->GetTLSAddress() + kCommandHeaderOffset +
-                                    offset);
-}
-
-} // namespace Kernel
-
 namespace IPC {
 
 /// Size of the command buffer area, in 32-bit words.