Revert HTML CW changes (#3020)

* selectively Revert "Fix regressions from #2683 (#2970)"

This reverts commit 72698bc3b4.

* Revert "Handle hashtags in spoiler_texts (partial fix for #699) (#2683)"

This reverts commit e2491680e6.

app/services/process_hashtags_service.rb

@@ -2,8 +2,7 @@
 
 class ProcessHashtagsService < BaseService
   def call(status, tags = [])
-    text = [status.text, status.spoiler_text].reject(&:blank?).join(' ')
-    tags = text.scan(Tag::HASHTAG_RE).map(&:first) if status.local?
+    tags = status.text.scan(Tag::HASHTAG_RE).map(&:first) if status.local?
 
     tags.map { |str| str.mb_chars.downcase }.uniq(&:to_s).each do |tag|
       status.tags << Tag.where(name: tag).first_or_initialize(name: tag)

app/services/process_mentions_service.rb

@@ -10,9 +10,7 @@ class ProcessMentionsService < BaseService
   def call(status)
     return unless status.local?
 
-    text = [status.text, status.spoiler_text].reject(&:blank?).join(' ')
-
-    text.scan(Account::MENTION_RE).each do |match|
+    status.text.scan(Account::MENTION_RE).each do |match|
       username, domain  = match.first.split('@')
       mentioned_account = Account.find_remote(username, domain)