[patch] Drop outdated code related to Demonic Sacrifice

[zergtmn]

For which repository revision was the patch created?

9855

This talent was removed from game in patch 3.1.

Patch:

http://github.com/zergtmn/mangos/commit/2cf87801b622aa626a3a493e83aa4c1185f8eda5

or

http://paste2.org/p/819958

[laise]

in [9873]. Thanks =)