creality.ini: remove parentheses for galaxy pla filament
creality.ini: remove parentheses for galaxy pla filament

since we've not using those for other filament subtypes

prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r