Remove unused polls code to reduce query volume.

Due to use of Submission.{choices, options, bet_options} in realbody,
generating submission_listings resulted in extremely high volume of
SELECT queries.

In local testing with 6 posts, one of which had a poll with 2 options,
the removal of these calls reduced quantity of queries on the homepage
from 84 to 22.

Given that it was previously decided to remove the polls feature after
a regression while adding comment filtering, the remaining dead code
paths for polls were also removed.

files/classes/mod_logs.py

@@ -224,11 +224,6 @@ ACTIONTYPES = {
 		"icon": 'fa-crown', 
 		"color": 'bg-success'
 	},
-	'distribute': {
-		"str": 'distributed bet winnings to voters on {self.target_link}', 
-		"icon": 'fa-dollar-sign', 
-		"color": 'bg-success'
-	},
 	'dump_cache': {
 		"str": 'dumped cache', 
 		"icon": 'fa-trash-alt',