title: module 'tensorflow' has no attribute 'GPUOptions'
body: <p>I'm using dell laptop with GTX 960M, and i installed tensorflow 2.0 alpha. i used to use 1.5 version and it work with tf.GPUOptions, but in this version, this causes an <code>error: AttributeError: module 'tensorflow' has no attribute 'GPUOptions'</code>
  someone help me if i do the thing wrong with this version</p>
  
  <blockquote>
    <p>Traceback (most recent call last):
          File "prepare_training.py", line 20, in 
            gpu_option = tf.GPUOptions(per_process_gpu_memory_fraction=0.333)
        AttributeError: module 'tensorflow' has no attribute 'GPUOptions'</p>
  </blockquote>