Remove error status from the error dialog.

We don't populate this with the new error reporting system.

Change-Id: Ib80c1852cb5e9a627e793ff468723e932dda500d
Reviewed-on: http://gerrit.dmdirc.com/3330
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>