Diff of /PDSim/flow/_flow.pyx [80bcaf] .. [83bb88]  Maximize  Restore

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--- a/PDSim/flow/_flow.pyx
+++ b/PDSim/flow/_flow.pyx
@@ -3,16 +3,12 @@
 import copy
 import cPickle
 from flow_models import PyFlowFunctionWrapper
-from PDSim.misc._listmath import listm
 
 from CoolProp.State import State as StateClass
 from CoolProp.State cimport State as StateClass
 
 from PDSim.core._containers import TubeCollection
 from PDSim.core._containers cimport TubeCollection
-
-
-
 
 from libc.stdlib cimport malloc, free, calloc