Revert "msys git defaults are stupid and breaking things."

This reverts commit 54933034e803097ec0c87d51bea060c4faf50063.

We might have to figure out a more selective way to do this.  For now,
let's not have people on all the other OSes getting stuck-modified files
like hg did.
Remove unintuitive loop condition from ActorScroller
Remove unused variable from ActorScroller