Tokens: removed unused tokens

Both of these were deprecated in PHPCS 3.3.0 and have been unused since.

Fixes squizlabs/PHP_CodeSniffer 1997

Related to 6

Author: gsherwood

src/Util/Tokens.php

@@ -35,7 +35,6 @@
 define('T_BITWISE_OR', 'PHPCS_T_BITWISE_OR');
 define('T_BITWISE_XOR', 'PHPCS_T_BITWISE_XOR');
 define('T_BITWISE_NOT', 'PHPCS_T_BITWISE_NOT');
-define('T_ARRAY_HINT', 'PHPCS_T_ARRAY_HINT');
 define('T_GREATER_THAN', 'PHPCS_T_GREATER_THAN');
 define('T_LESS_THAN', 'PHPCS_T_LESS_THAN');
 define('T_BOOLEAN_NOT', 'PHPCS_T_BOOLEAN_NOT');
@@ -69,7 +68,6 @@
 define('T_GOTO_LABEL', 'PHPCS_T_GOTO_LABEL');
 define('T_BINARY_CAST', 'PHPCS_T_BINARY_CAST');
 define('T_EMBEDDED_PHP', 'PHPCS_T_EMBEDDED_PHP');
-define('T_RETURN_TYPE', 'PHPCS_T_RETURN_TYPE');
 define('T_OPEN_USE_GROUP', 'PHPCS_T_OPEN_USE_GROUP');
 define('T_CLOSE_USE_GROUP', 'PHPCS_T_CLOSE_USE_GROUP');
 define('T_ZSR', 'PHPCS_T_ZSR');