Remove vials from clan war

[StephanM]

Why would u decrease donation vials' time by 10 seconds?
I think what makes them unique is their speed and they last longer than normal ones.
Nerfing them like that will make them useless and aint worth spending coins on them

To make them slightly better as bounty version, they would still give 20% more movement speed and you could use 4 more vials per game vs the proposed lvl 99 ones.
If they would stay at 15 seconds that would mean 1 donation vial lasts as long as 3 99 ones, 1 full set of 99 would be equal of 2 donation vials with 20% less speed, quite OP if you'd ask me.

The idea behind this is to balance it a tad more, but these are not final numbers. Can always push the duration up to 7.5 or 10, but 15 is way too much.