Are you aware of the Sequential module? It allows you to chain together layers into a single variable, making this repetition disappear into a single forward/__call__ on the Sequential.
Unfortunately it's most an issue with more complicated architectures. When testing different designs I often forget to modify it in both places and sure it's not a huge deal, but having one place or two does feel like a qualitative difference in cognitive burden. For example if I introduce a bool flag which decides whether I do a particular alternative design, I have to chech the flag and do an if/else in two places: once to create the layers, once to use them.