Revert "SalutXmppConnectionManager: connect to TpSvcConnection::status-changed and close streams"
Revert "SalutXmppConnectionManager: connect to TpSvcConnection::status-changed and close streams"

This reverts commit 38b693ab35ccee5595f5c92b4537f7ac1e19e837.

XCM is disposed when closing the connection so there is no need to do
that.

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut