Update CONTRIBUTING.md
Build/CMake: CMake options cleanup after febb26d4b711762b1ee605705e7fa949b9871df1
Tools/Extractors: Updated vmap_extractor for 6.0.2
Core/Misc: Remove dead code

Remove a double check on result of same function, with the 2nd being always true.
Merge pull request #1 from TrinityCore/6.x

merge