fix: call authorization_error! on IMAP auth failures (#13560) (revert) (#13671)

This reverts commit 7acd239c70 to further
debug upstream issues.

lib/exception_list.rb

@@ -16,10 +16,4 @@ module ExceptionList
     Errno::ECONNRESET, Errno::ENETUNREACH, Net::IMAP::ByeResponseError,
     SocketError
   ].freeze
-
-  IMAP_TRANSIENT_EXCEPTIONS = (IMAP_EXCEPTIONS + [
-    EOFError, OpenSSL::SSL::SSLError, Net::IMAP::NoResponseError, Net::IMAP::BadResponseError,
-    Net::IMAP::InvalidResponseError, Net::IMAP::ResponseParseError,
-    Net::IMAP::ResponseReadError, Net::IMAP::ResponseTooLargeError
-  ]).freeze
 end

lib/redis/redis_keys.rb

@@ -52,8 +52,4 @@ module Redis::RedisKeys
 
   ## Account Email Rate Limiting
   ACCOUNT_OUTBOUND_EMAIL_COUNT_KEY = 'OUTBOUND_EMAIL_COUNT::%<account_id>d::%<date>s'.freeze
-
-  ## Transient Error Backoff
-  BACKOFF_RETRY_COUNT = 'BACKOFF:%<obj_type>s:%<obj_id>d:retry_count'.freeze
-  BACKOFF_RETRY_AFTER = 'BACKOFF:%<obj_type>s:%<obj_id>d:retry_after'.freeze
 end