Dont need module namespace

lib/exceptions.rb

@@ -38,14 +38,14 @@ module Mastodon
 
   HTTP_CONNECTION_ERRORS = [
     Addressable::URI::InvalidURIError,
+    HostValidationError,
     HTTP::ConnectionError,
     HTTP::Error,
     HTTP::TimeoutError,
     IPAddr::AddressFamilyError,
-    Mastodon::HostValidationError,
-    Mastodon::LengthValidationError,
-    Mastodon::PrivateNetworkAddressError,
-    Mastodon::UnexpectedResponseError,
+    LengthValidationError,
     OpenSSL::SSL::SSLError,
+    PrivateNetworkAddressError,
+    UnexpectedResponseError,
   ].freeze
 end