LHCbMath - remove unused 1/sqrt methods
Never used, as far as I can tell (LHCb,Lbcom,Rec and Brunel build just fine without them).
In my view, they are overly complicated and potentially a maintenance burden. If a need arises for a super fast (vectorised) 1/sqrt implementation, I am sure a simpler, less hardware dependent solution can be found.
Edited by Marco Cattaneo