Remove count item from reactions
Remove count item from reactions

Since we now store and show the users for each reaction, we don't need
to store count as well. Each user can only react with a specific
reaction to a specific message once, so to get the count we can check
the length of the list of users.

trygveaa/wee-slack,rawdigits/wee-slack,scharfie/wee-slack,megalithic/wee-slack,wee-slack/wee-slack