Remove unused methods from StreamEntriesHelper (#1365)

Removes:

- avatar_for_status_url
- relative_time
- reblogged_by_me_class
- favourited_by_me_class

app/helpers/stream_entries_helper.rb

@@ -9,10 +9,6 @@ module StreamEntriesHelper
     "@#{account.acct}#{@external_links && account.local? ? "@#{Rails.configuration.x.local_domain}" : ''}"
   end
 
-  def avatar_for_status_url(status)
-    status.reblog? ? status.reblog.account.avatar.url(:original) : status.account.avatar.url(:original)
-  end
-
   def entry_classes(status, is_predecessor, is_successor, include_threads)
     classes = ['entry']
     classes << 'entry-reblog u-repost-of h-cite' if status.reblog?
@@ -22,18 +18,6 @@ module StreamEntriesHelper
     classes.join(' ')
   end
 
-  def relative_time(date)
-    date < 5.days.ago ? date.strftime('%d.%m.%Y') : "#{time_ago_in_words(date)} ago"
-  end
-
-  def reblogged_by_me_class(status)
-    user_signed_in? && @reblogged.key?(status.id) ? 'reblogged' : ''
-  end
-
-  def favourited_by_me_class(status)
-    user_signed_in? && @favourited.key?(status.id) ? 'favourited' : ''
-  end
-
   def rtl?(text)
     return false if text.empty?