Remove wrapper function free_network_nolock() that can be replaced by a single line of code.

This patch renames _free_network_nolock() function to free_network_nolock().
Signed-off-by: NAmitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>