Remove some dead code.

Change-Id: I012bda14c81e80219b1b4db8cd1db1b15f70fb68
Reviewed-on: http://gerrit.dmdirc.com/2918
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager
Use @Exported annotation in ProGuard.

Change-Id: I2d805d5437e8b83d58a1b3e4c0ea35ec4599238f
Reviewed-on: http://gerrit.dmdirc.com/2914
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>