Kernel: Remove unused WorkQueue::m_name.

Kernel/WorkQueue.cpp

@@ -39,7 +39,6 @@ void WorkQueue::initialize()
 }
 
 WorkQueue::WorkQueue(const char* name)
-    : m_name(name)
 {
     RefPtr<Thread> thread;
     Process::create_kernel_process(thread, name, [this] {

Kernel/WorkQueue.h

@@ -84,7 +84,6 @@ private:
 
     void do_queue(WorkItem*);
 
-    const char* const m_name;
     RefPtr<Thread> m_thread;
     WaitQueue m_wait_queue;
     IntrusiveList<WorkItem, &WorkItem::m_node> m_items;