Message with the aim "erase" is being listened to, but it is never sent

[triinuerik]

In the file content.js, the messageHandler method is listening to a message with the aim "erase", but I cannot find anywhere where this message is actually sent - possibly redundant aim?

[benel]

This message handler was added by commit b571014.

@gnoxr's idea was probably to reuse erase() in other cases such as when you close LaSuli.