Random palette pixels in elder_guardian.png UV texture map

There are left over pixels in the UV texture map for the elder guardian, which were seemingly used for a previous palette when making the texture. These pixels go "unused" in the sense that they are unrelated to the texture and were likely not intentional, but (despite the fact that they normally aren't visibile in game) can still be seen under certain circumstances.

Unused Pixels

(Highlighted in red)

Fix:

(This fix does not account for MC-271510)

Notes:

(Because the issue has not been confirmed or triaged yet, it has been altered to split off a seperate issue MC-271510 into it's own report to avoid any conflict)