Drop redundant initialization test for DM.

Author: bsmith89

pymc3/tests/test_distributions.py

@@ -1049,15 +1049,6 @@ def test_multinomial_vec_2d_p(self):
                             model.fastlogp({'m': vals}),
                             decimal=4)
 
-    @pytest.mark.parametrize('alpha,n', [
-        [[[.25, .25, .25, .25]], [1]],
-    ])
-    def test_dirichlet_multinomial_init(self, alpha, n):
-        alpha = np.array(alpha)
-        n = np.array(n)
-        with Model() as model:
-            m = DirichletMultinomial('m', n=n, alpha=alpha)
-
     @pytest.mark.parametrize('alpha,n', [
         [[[.25, .25, .25, .25]], [1]],
         [[[.3, .6, .05, .05]], [2]],