remove TODOs, old comment and tested elsewhere

Author: lkirk

python/_tskitmodule.c

@@ -8203,7 +8203,6 @@ TreeSequence_two_locus_count_stat(TreeSequence *self, PyObject *args, PyObject *
         .summary_func = summary_func,
         .norm_func = norm_func,
     };
-    // TODO: deal with null norm func, need general stat.
     err = tsk_treeseq_two_locus_count_general_stat(self->tree_sequence, num_sample_sets,
         PyArray_DATA(sample_set_sizes_array), PyArray_DATA(sample_sets_array),
         output_dim, general_two_locus_count_stat_func, params,

python/tests/test_python_c.py

@@ -2097,13 +2097,6 @@ def norm_func(X, n, nA, nB):
             method(ss_sizes, ss, lambda a, b: 1, norm_func, 1, True, *site_args)
         with pytest.raises(ValueError, match="length 2; must be 1"):
             method(ss_sizes, ss, lambda a, b: [1, 2], norm_func, 1, True, *site_args)
-        # TODO: Cannot test without multiallelic sites
-        # with pytest.raises(ValueError, match="summary function.*must be 1D"):
-        #     method(ss_sizes, ss, stat_func, lambda a, b, c, d: 1, 1, True, *site_args)
-        # with pytest.raises(ValueError, match="length 2; must be 1"):
-        #     method(
-        #         ss_sizes, ss, stat_func, lambda a, b, c, d: [1, 2], 1, True, *site_args
-        #     )
         # C API errors
         with pytest.raises(tskit.LibraryError, match="TSK_ERR_STAT_UNSORTED_SITES"):
             bad_sites = np.array([1, 0, 2], dtype=np.int32)