How to remove input layer from cnn model

Question

i want to remove the input layer from my pre-trained Xception model cause i want to add it's layers to my custom model so i tried to remove the input layer like this:

newmodel=Xception(weights='imagenet',input_shape(224,224,3),include_top=False)  
newmodel.layers[0].pop()

so that i should have Xception model without the input layer but the problem is it gives me this error

AttributeError: 'InputLayer' object has no attribute 'pop'

so is it possible to remove the input layer from the model just to use all it's layers in another one?