Remove autosetupmerge and autosetuprebase

While these configs are useful in the event that I want to `git pull` on
feature branches and have them update from their source branch, I find
that in practice I rarely use this workflow. I generally only pull on
branches which track a remote branch directly, and I normally reach for
`git rebase` when updating feature branches from their source. These
configurations also interfere with my workflow of `git push` creating
the branch in my origin if absent.

src/.gitconfig

@@ -27,9 +27,6 @@
 	sur = submodule update --recursive
 [apply]
 	whitespace = fix
-[branch]
-	autosetupmerge = always
-	autosetuprebase = always
 [color]
 	branch = auto
 	diff = auto