I wouldn't have thought so. Back then version control was making copies on a floppy disk. A lot of developers didn't even have dedicated build machines let alone the fancy CI/CD pipelines we do these days. Plus most studios had pretty tight deadlines. So if they did any code sharing it would have been more like copying/pasting rather than assembly macros. In fact I wouldn't be surprised if the "copying/pasting" was literally someone printing out (to a dot matrix printer) and an office junior manually punching those instructions back in on another machine.

It was a very different era back then. Tooling sucked and everything was a lot more manual. But we didn't mind as were still pushing boundaries of our imaginations and didn't know any better.