text: Title: [MNT] Remove Reshape layer from Deep Learning Clusterers
  Body: ### Describe the issue
  
  The `tf.keras.layers.Reshape` was introduced in `clustering/deep_learnin` to make the input shape of the encoder equal to the output shape of the decoder which is already being tested in `test_all_networks.py`. So, basically it is unnecessary at the moment.
  
  ### Suggest a potential alternative/fix
  
  Remove it.