ToolInvoker._get_alignments: fix missing self parameter
ToolInvoker._get_alignments: fix missing self parameter

Caught by pylint. I wonder if we need this piece of code as nobody every
triggered it.

Reviewed-by: James Cameron <979be511e3d216882811a349af33a6d24f3f5f99@laptop.org>
Acked-by: Simon Schampijer <088e16a1019277b15d58faf0541e11910eb756f6@laptop.org>
CC: Aleksey Lim <d5bf2610dd6437bac88d27fdba1816912b38ee2a@member.fsf.org>

Daksh/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit,samdroid-apps/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit,tchx84/debian-pkg-sugar-toolkit,ceibal-tatu/sugar-toolkit,godiard/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,Daksh/sugar-toolkit-gtk3,gusDuarte/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit,sugarlabs/sugar-toolkit,samdroid-apps/sugar-toolkit-gtk3,puneetgkaur/sugar-toolkit-gtk3,quozl/sugar-toolkit-gtk3,tchx84/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit,puneetgkaur/sugar-toolkit-gtk3,gusDuarte/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,gusDuarte/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,quozl/sugar-toolkit-gtk3,manuq/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit-gtk3,tchx84/sugar-toolkit-gtk3,manuq/sugar-toolkit-gtk3,samdroid-apps/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit,quozl/sugar-toolkit-gtk3,Daksh/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit,sugarlabs/sugar-toolkit,ceibal-tatu/sugar-toolkit-gtk3,puneetgkaur/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,manuq/sugar-toolkit-gtk3,gusDuarte/sugar-toolkit-gtk3,quozl/sugar-toolkit-gtk3,godiard/sugar-toolkit-gtk3,puneetgkaur/backup_sugar_sugartoolkit,tchx84/debian-pkg-sugar-toolkit-gtk3,godiard/sugar-toolkit-gtk3,puneetgkaur/backup_sugar_sugartoolkit,puneetgkaur/backup_sugar_sugartoolkit,samdroid-apps/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3,tchx84/sugar-toolkit-gtk3