Revert "PwQPolynomial.eval_from_dict: Check whether eval point is in domain"

This reverts commit bd13bed9. Turns out
PwQPolynomial is implicitly zero outside of its domain, and validity
needs to be tracked through other means.

islpy/__init__.py

@@ -687,10 +687,6 @@ def _add_functionality():
             pt = pt.set_coordinate_val(
                 dim_type.param, i, value_dict[par_name])
 
-        if not (Set.from_point(pt) <= self.domain()):
-            raise ValueError("evaluation point outside of domain of "
-                    "definition of piecewise quasipolynomial")
-
         return self.eval(pt).to_python()
 
     PwQPolynomial.eval_with_dict = pwqpolynomial_eval_with_dict