Make room? Intel file protocols?
If you own an Intel Mac, you can initialize its Hard Drive with Intel/Windows formats as Native formats.
'make room" was probably not the best choice of words. The daunting complexity of modifying all the existing software to handle Intel/Windows protocols as Native protocols, in addition to all the existing Apple, Internet, and Server protocols, without breaking anything, and getting it all tested and working properly is enormous. It is not surprising that some protocols (probably thought to be the least used) would be eliminated. Eliminating AppleTalk-only File Sharing isolates only pre-7.5.3 Macs.
As I mentioned above, there is a built-in mechanism for File Sharing FROM 7.5.3 and later Macs using IP, although it is a little obtuse.
A similar elimination happened at OS 8.0, when support for single-sided MFS diskettes was dropped with the first introduction of the new HFS+ Extended format, fully functional in OS 8.1.