remove commented code, floor and round moment

Author: farhanreynaldo

pymc/distributions/discrete.py

@@ -114,11 +114,10 @@ class Binomial(Discrete):
     def dist(cls, n, p, *args, **kwargs):
         n = at.as_tensor_variable(intX(n))
         p = at.as_tensor_variable(floatX(p))
-        # mode = at.cast(tround(n * p), self.dtype)
         return super().dist([n, p], **kwargs)
 
     def get_moment(rv, size, n, p):
-        mean = n * p
+        mean = at.round(n * p)
         if not rv_size_is_none(size):
             mean = at.full(size, mean)
         return mean
@@ -573,10 +572,10 @@ class Poisson(Discrete):
     @classmethod
     def dist(cls, mu, *args, **kwargs):
         mu = at.as_tensor_variable(floatX(mu))
-        # mode = intX(at.floor(mu))
         return super().dist([mu], *args, **kwargs)
 
     def get_moment(rv, size, mu):
+        mu = at.floor(mu)
         if not rv_size_is_none(size):
             mu = at.full(size, mu)
         return mu