Drop EOL Ruby 2.7 (#24237)

app/models/account.rb

@@ -410,7 +410,7 @@ class Account < ApplicationRecord
   end
 
   class << self
-    DISALLOWED_TSQUERY_CHARACTERS = /['?\\:‘’]/.freeze
+    DISALLOWED_TSQUERY_CHARACTERS = /['?\\:‘’]/
     TEXTSEARCH = "(setweight(to_tsvector('simple', accounts.display_name), 'A') || setweight(to_tsvector('simple', accounts.username), 'B') || setweight(to_tsvector('simple', coalesce(accounts.domain, '')), 'C'))"
 
     REPUTATION_SCORE_FUNCTION = '(greatest(0, coalesce(s.followers_count, 0)) / (greatest(0, coalesce(s.following_count, 0)) + 1.0))'

app/models/concerns/omniauthable.rb

@@ -4,7 +4,7 @@ module Omniauthable
   extend ActiveSupport::Concern
 
   TEMP_EMAIL_PREFIX = 'change@me'
-  TEMP_EMAIL_REGEX  = /\A#{TEMP_EMAIL_PREFIX}/.freeze
+  TEMP_EMAIL_REGEX  = /\A#{TEMP_EMAIL_PREFIX}/
 
   included do
     devise :omniauthable