What is the concept of model pruning in PyTorch?

PyTorch model pruning is the process of reducing the size and computational complexity of a neural network by eliminating unnecessary parameters or neurons. Pruning techniques can help optimize the model, improve inference speed, reduce memory consumption and power usage, and enhance generalization by decreasing the number of model parameters. In PyTorch, various libraries and tools such as the torch.nn.utils.prune module for weight pruning or third-party libraries like NNI (Neural Network Intelligence) can be used to implement model pruning.