Is there a machzor ashkenaz for yomim noroim without piyutim? Seeing that we skip so much of it these days, it would be proper if we had a smaller standardised machzor.
There is, the machzor used by (and published by) the Zilberman yeashiva of Jerusalem's Old City and the Horva synagogue. They say most of the piyutim said by other yeshivos that I am familiar with, but after the chazan's repetition instead of during, other than the avoda piyut of Yom Kippur. These are printed there and not in the traditional places. The piyutim that they don't say are not printed at all. Also generally the layout is exceptional. It comes out to one small volume for Rosh Hashana and Yom Kippur together.
But I don't recommended it for anyone davening at a standard minyan. The change of structure would be very confusing, and the gain of not having the piyutim that are not said is offset by the ones that are said being in a new place or skipped, and other changes from the standard nusach.
BTW, many standard machzorim put piyutim that are usually skipped either in small type or in the back of the book, like the English Artscroll machzorim, Feldhim's Keter Malchus, and Machzor Sidur Tefilosanu.