Revert "Core: Implement Role based Access Control"

This reverts commit b980aff83e214bab60f141c879c2a392789a4d16.

Conflicts:
	sql/old/3.3.5a/TDB50_to_TDB51_updates/world/2013_02_04_03_world_misc.sql
	src/server/game/Accounts/AccountMgr.cpp
	src/server/game/Accounts/AccountMgr.h
	src/server/game/Chat/Chat.cpp
	src/server/game/Handlers/MiscHandler.cpp
	src/server/game/Miscellaneous/Language.h
	src/server/game/Server/WorldSession.cpp
	src/server/game/Server/WorldSession.h
	src/server/game/World/World.cpp
	src/server/shared/Database/Implementation/LoginDatabase.cpp