When decrypting the last event for archived rooms when a room key is
received, we used to send a synthetic SyncUpdate. This however put the
archived room into the join section, which converted the room to a
joined room. We need to respect what section the room was in when
sending synthetic SyncUpdates.
fixes https://github.com/famedly/matrix-dart-sdk/issues/1916
This makes no sense anymore.
In the past we tried to use this
Exception type to have a
unified exception for all
network errors. However, this
is only in use for the custom
request method and for every
other api call it is not. So to
have the same error messages
every time, we should just remove
it.