travis cycle detection flag removed

.travis.yml

@@ -68,7 +68,7 @@ matrix:
       env: PART="theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32"
 
 script:
-  - export THEANO_FLAGS=$THEANO_FLAGS,cycle_detection='fast',warn.ignore_bug_before=all,on_opt_error=raise,on_shape_error=raise,gcc.cxxflags=-pipe
+  - export THEANO_FLAGS=$THEANO_FLAGS,warn.ignore_bug_before=all,on_opt_error=raise,on_shape_error=raise,gcc.cxxflags=-pipe
   - python --version
   - uname -a
   - free -m