displayio: Remove verbose error

Author: jensechu

shared-bindings/displayio/ColorConverter.c

@@ -116,10 +116,7 @@ const mp_obj_property_t displayio_colorconverter_dither_obj = {
 STATIC mp_obj_t displayio_colorconverter_make_transparent(mp_obj_t self_in, mp_obj_t transparent_color_obj) {
     displayio_colorconverter_t *self = MP_OBJ_TO_PTR(self_in);
 
-    mp_int_t transparent_color;
-    if (!mp_obj_get_int(&transparent_color)) {
-        mp_raise_ValueError(translate("transparent_color should be an int"));
-    }
+    mp_int_t transparent_color = mp_obj_get_int(&transparent_color);
     common_hal_displayio_colorconverter_make_transparent(self, transparent_color);
     return mp_const_none;
 }