.gitconfig: Set push.default = simple

Author: mathiasbynens

.gitconfig

@@ -159,10 +159,8 @@
 
 [push]
 
-	# Use the Git 1.x.x default to avoid errors on machines with old Git
-	# installations. To use `simple` instead, add this to your `~/.extra` file:
-	# `git config --global push.default simple`. See http://git.io/mMah-w.
-	default = matching
+	# https://git-scm.com/docs/git-config#git-config-pushdefault
+	default = simple
 	# Make `git push` push relevant annotated tags when pushing branches out.
 	followTags = true