Can we remove the input layer of a pre-trained model? Does it affect the weights of the model?

I have a pretrained model with input size batch size, 36, 2048, 3. I want to use this model 3 times. In first time I dont need to change the input, however, I need to change the input of the second instance of the model. I want to make it batch size, 36, 2048. Can we delete the input layers of the pre-trained model? Really appreciated for your help yesterday.