Both /proc and /sys are virtual filesystems which reflect the state of the system, and allow you to change several runtime parameters (and sometimes do more dangerous things, like directly writing to the memory or to a device). You should never backup or restore them.

You might think that a one-line configuration file is not worth backing up. However, if it took you three hours to figure out how to set that configuration, it will probably take you three hours again in six months time.