Merge pull request #13455 Rochet2/ah

AH related fixes

(cherry picked from commit d924553002339a07544063784acd6241ce469986)
Core/AH: Code cleanup

Remove unused paramters from RemoveAuction(), kept till now for compatibility with ahbot patch.
Reverts 28dffbee11024c1abc82a29a3fef655d9262904b

(cherry picked from commit 8d39ad435a1f85d73e438c07e81003bfaa0c125f)
Merge branch '6.x' of https://github.com/TrinityCore/TrinityCore into 6.x