im not fully sure i thought it was a resource pack kind of deal like if you go into the minecraft folder find the pic that has them in it and erased them in paint then they wouldnt be there
ps also if you could tell me what (1.7 is no longer supported on this forum.
Please update to a modern version of Minecraft to receive support.) Means i would like to know cause i need help with updating a 1.7.10 mod to 1.12.2