Post.fast_count: remove uses of unused statement_timeout param (#3206).

Not used since 81684e6.

app/controllers/counts_controller.rb

@@ -2,6 +2,6 @@ class CountsController < ApplicationController
   respond_to :xml, :json
 
   def posts
-    @count = Post.fast_count(params[:tags], :statement_timeout => CurrentUser.user.statement_timeout)
+    @count = Post.fast_count(params[:tags])
   end
 end

app/controllers/posts_controller.rb

@@ -80,7 +80,6 @@ class PostsController < ApplicationController
   end
 
   def random
-    count = Post.fast_count(params[:tags], :statement_timeout => CurrentUser.user.statement_timeout)
     @post = Post.tag_match(params[:tags]).random
     raise ActiveRecord::RecordNotFound if @post.nil?
     respond_with(@post) do |format|