Removed unneeded powers_precomp struct.
Removed unneeded powers_precomp struct.

dsroche/flint2,dsroche/flint2,fredrik-johansson/flint2,fredrik-johansson/flint2,wbhart/flint2,wbhart/flint2,jpflori/flint2,jpflori/flint2,jpflori/flint2,wbhart/flint2,jpflori/flint2,fredrik-johansson/flint2,dsroche/flint2,dsroche/flint2