Remove deprecated methods.

Change-Id: I9c0f0cc56b11844399b95a19cc855771984d03a0
Depends-On: Iddf8113511c0b8787d182e8f6d856f10beaabd84
Reviewed-on: http://gerrit.dmdirc.com/3296
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>