Remove unused import of register_stabilize opt in CTC

theano/gpuarray/ctc.py

@@ -10,7 +10,6 @@ from .elemwise import GpuDimShuffle
 from theano.gradient import grad_undefined
 from theano.gof import local_optimizer
 from theano.tensor.opt import register_canonicalize
-from theano.tensor.opt import register_stabilize
 from theano.tensor.nnet.ctc import ctc_available
 
 import os

theano/tensor/nnet/ctc.py

@@ -7,7 +7,6 @@ from theano import gof
 from theano.gof import local_optimizer
 from theano.gof.cmodule import GCC_compiler
 from theano.tensor.opt import register_canonicalize
-from theano.tensor.opt import register_stabilize
 from theano.tensor.extra_ops import cpu_contiguous
 from theano.gradient import grad_undefined