Merge branch 'jk/create-branch-remove-unused-param' into maint

Code clean-up.

* jk/create-branch-remove-unused-param:
  create_branch: drop unused "head" parameter

builtin/checkout.c

@@ -631,7 +631,7 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 			}
 		}
 		else
-			create_branch(old->name, opts->new_branch, new->name,
+			create_branch(opts->new_branch, new->name,
 				      opts->new_branch_force ? 1 : 0,
 				      opts->new_branch_log,
 				      opts->new_branch_force ? 1 : 0,