Remove redundant assignment
`Data_Get_Struct()` was already called in `rm_check_destroyed()`
This patch will remove redundant assignment by `Data_Get_Struct()`.
@@ -9326,8 +9326,6 @@ Image_negate_channel(int argc, VALUE *argv, VALUE self)
grayscale = RTEST(argv[0]);
}
- Data_Get_Struct(self, Image, image);
-
new_image = rm_clone_image(image);
(void) NegateImageChannel(new_image, channels, grayscale);
