diff --git a/hydra/vis_sampler.py b/hydra/vis_sampler.py
index 912211b..d6a82ac 100644
--- a/hydra/vis_sampler.py
+++ b/hydra/vis_sampler.py
@@ -1,10 +1,6 @@
 import numpy as np
-import pylab as plt
-import scipy.sparse
 import numpy.fft as fft
 
-from .utils import flatten_vector, reconstruct_vector
-
 
 def apply_sqrt_pspec(sqrt_pspec, v, group_id, ifft=False):
     """
diff --git a/hydra/vis_simulator.py b/hydra/vis_simulator.py
index fb76912..f4252fa 100644
--- a/hydra/vis_simulator.py
+++ b/hydra/vis_simulator.py
@@ -11,7 +11,7 @@
 from matvis import conversions
 import healpy as hp
 from multiprocessing import Pool, cpu_count
-import os, warnings, time
+import warnings, time
 from datetime import datetime
 from . import utils