DBG: Remove old references to CriticalSectionLocker

x64_dbg_dbg/threading.h

@@ -22,9 +22,6 @@ bool waitislocked(WAIT_ID id);
 // Better, but requires VISTA+
 // https://msdn.microsoft.com/en-us/library/windows/desktop/aa904937%28v=vs.85%29.aspx
 //
-#define CriticalSectionLocker
-#define locker(x) EXCLUSIVE_ACQUIRE(x)
-
 #define EXCLUSIVE_ACQUIRE(Index)    SectionLocker<SectionLock::##Index, false> __ThreadLock;
 #define EXCLUSIVE_RELEASE()         __ThreadLock.Unlock();