You learn UnrealScript mainly by reading other people's code. Removing code without an important reason (download size reduction and lack of helpfulness are not important in that sense) is extremely antisocial IMHO.
Could you share the information about what be those libraries.
atls.lib(atlbase.obj) : error LNK2019: unresolved external symbol "int __cdecl ATL::_AtlInitializeCriticalSectionEx(struct _RTL_CRITICAL_SECTION *,unsigned long,unsigned long)" (?_AtlInitializeCriticalSectionEx@ATL@@YAHPAU_RTL_CRITICAL_SECTION@@KK@Z) referenced in function "public: long __thiscall ATL::CComCriticalSection::Init(void)" (?Init@CComCriticalSection@ATL@@QAEJXZ)
CComCriticalSection::Init()
_AtlInitializeCriticalSectionEx(args...)
InitializeCriticalSection(args...)