a11y: Remove unused code
a11y: Remove unused code

The function is always called with 0 quark (since commit
a44035e91dffdbeb3613d56234c74bb6d8483368), so just removed
the parameter.

jessevdk/vte,flaxandteal/gasket-vte,flaxandteal/gasket-vte,thestinger/vte-ng,flaxandteal/gasket-vte,flaxandteal/gasket-vte,saitoha/vte-sixel,jessevdk/vte,saitoha/vte-sixel,rvu95/vte,thestinger/vte-ng,jessevdk/vte,saitoha/vte-sixel,rvu95/vte,thestinger/vte-ng,jessevdk/vte,rvu95/vte,rvu95/vte