Dried ghast "tentacles" texture files are twice the resolution they need to be

Discovered while testing and relates to MC-297324.

All block textures in the game are 16x16 pixels - except for the dried ghast’s tentacles, for some reason, which are 32x32.

This is a problem for several reasons: they take up four times the space they need in the texture atlas, using this texture in models is unintuitive since mapping works in sixteenths of a file, and the overall file size is bigger than necessary.

This could be resolved by deleting the two unused tentacle texture areas as 297324 describes, and then rearranging things so that they fit in a 16x16 area, and updating the mapping on the dried ghast models accordingly. However, a better option may be to scrap these files entirely, and move the tentacle textures to the other dried ghast texture files, since after removing the unused pixels there should be enough space. The two west tentacles could go on the west file, the two back tentacles on the south file and the two east tentacles on the south file. This would also make it immediately obvious what tentacles are in what direction, rather than having to guess.