flake8; removed special logic for discrete spaces in dummy_vec_env

baselines/common/test_mpi_util.py

@@ -1,5 +1,3 @@
-import subprocess
-import sys
 from baselines import logger
 from baselines.common.tests.test_with_mpi import with_mpi
 from baselines.common import mpi_util

baselines/common/vec_env/dummy_vec_env.py

@@ -1,5 +1,4 @@
 import numpy as np
-from gym import spaces
 from .vec_env import VecEnv
 from .util import copy_obs_dict, dict_to_obs, obs_space_info