Remove duplicate imports

theano/configdefaults.py

@@ -1241,7 +1241,6 @@ AddConfigVar('cmodule.debug',
 def check_mkl_openmp():
     if not theano.config.blas.check_openmp:
         return
-    import os, sys
     if sys.platform == 'darwin':
         return
     if ('MKL_THREADING_LAYER' in os.environ and