Remove `TotpRecoveryCode.remove_all_for(user)` method

app/models/totp_recovery_code.rb

@@ -8,10 +8,4 @@ class TotpRecoveryCode < ApplicationRecord
   def self.generate_for(user)
     TotpRecoveryCode.create!(Array.new(16) { {user: user, code: SecureRandom.base58(8).downcase} })
   end
-
-  # @param user [User]
-  # @return [Integer]
-  def self.remove_all_for(user)
-    TotpRecoveryCode.where(user: user).delete_all
-  end
 end