Remove Main reference from IdentityManager.
Remove Main reference from IdentityManager.

(There's nothing particularly wrong with this, but it keeps showing
up when I try to find usages of Main to remove.)

Change-Id: I291ca91fc7e80e9dab40befa31424d9d7e0b62d1
Reviewed-on: http://gerrit.dmdirc.com/2665
Reviewed-by: Greg Holmes <79e2475f81a6317276bf7cbb3958b20d289b78df@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

DMDirc/DMDirc,csmith/DMDirc,csmith/DMDirc,ShaneMcC/DMDirc-Client,DMDirc/DMDirc,csmith/DMDirc,ShaneMcC/DMDirc-Client,ShaneMcC/DMDirc-Client,greboid/DMDirc,ShaneMcC/DMDirc-Client,greboid/DMDirc,csmith/DMDirc,DMDirc/DMDirc,DMDirc/DMDirc,greboid/DMDirc,greboid/DMDirc