Revert "git: alias"

This reverts commit 3445da0d72.

.gitconfig

@@ -11,6 +11,10 @@
 		remote = remote -v
 		sp = stage -p
 		last = log -1 HEAD --stat
+		# Delete all local branches but master and the current one, only if they are fully merged with master.
+		delbranches = "!f(){\
+    -	git branch | grep -v "master" | grep -v ^* | xargs git branch -d;\
+    }; f"
 		dellast = reset HEAD^1
 [core]
 		editor = vim