Remove go/ link from colab.ipynb (#3963)
Remove go/ link from colab.ipynb (#3963)

go/ links should not be used externally. 
balopat/Cirq,balopat/Cirq,quantumlib/Cirq,balopat/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq