Revert "_check_syntax compile the constraint instead of just the rhs of the constraint"
Revert "_check_syntax compile the constraint instead of just the rhs of the constraint"

This reverts commit 21884328584205fdf5aadc907215de6ce58bfcdd.

SasView/sasview,SasView/sasview,SasView/sasview,SasView/sasview,SasView/sasview,SasView/sasview