pointSize isn't a material property;

api/lovr/graphics/newMaterial.lua

@@ -71,11 +71,6 @@ return {
           type = 'number',
           description = 'TODO'
         },
-        {
-          name = 'pointSize',
-          type = 'number',
-          description = 'TODO'
-        },
         {
           name = 'texture',
           type = 'Texture',