Removes mask variable from the graph.
tf.contrib.model_pruning.strip_pruning_vars_fn( input_graph_def, output_node_names )
Replaces the masked_weight tensor with element-wise multiplication of mask and the corresponding weight variable.
input_graph_def: A GraphDef in which the variables have been converted to constants. This is typically the output of tf.graph_util.convert_variables_to_constant()
output_node_names: List of name strings for the result nodes of the graph
A GraphDef in which pruning-related variables have been removed