diff --git a/GPy/inference/mcmc/samplers.py b/GPy/inference/mcmc/samplers.py
index 02b677ba..2fd88d2f 100644
--- a/GPy/inference/mcmc/samplers.py
+++ b/GPy/inference/mcmc/samplers.py
@@ -3,12 +3,8 @@
 from __future__ import print_function
 
 import numpy as np
-from scipy import linalg, optimize
-import Tango
 import sys
-import re
-import numdifftools as ndt
-import pdb
+
 
 try:
     #In Python 2, cPickle is faster. It does not exist in Python 3 but the underlying code is always used