Remove unused imports

Author: paulbalandan

system/Psr/Cache/Item.php

@@ -14,7 +14,6 @@
 use CodeIgniter\Cache\Handlers\BaseHandler;
 use CodeIgniter\I18n\Time;
 use DateInterval;
-use DateTime;
 use DateTimeInterface;
 use InvalidArgumentException;
 use Psr\Cache\CacheItemInterface;

system/Psr/Cache/Pool.php

@@ -11,9 +11,7 @@
 
 namespace CodeIgniter\Psr\Cache;
 
-use CodeIgniter\Cache\CacheInterface;
 use CodeIgniter\I18n\Time;
-use Config\Cache;
 use Psr\Cache\CacheItemInterface;
 use Psr\Cache\CacheItemPoolInterface;
 

system/Psr/Cache/SimpleCache.php

@@ -11,7 +11,6 @@
 
 namespace CodeIgniter\Psr\Cache;
 
-use CodeIgniter\I18n\Time;
 use DateInterval;
 use Psr\SimpleCache\CacheInterface;
 use Traversable;