remove unused identifiers

Author: glaszig

tests/Integration/ExtendTest.php

@@ -5,17 +5,8 @@
 
 namespace Palicao\PhpRedisTimeSeries\Tests\Integration;
 
-use DateInterval;
-use DateTime;
-use DateTimeImmutable;
-use Palicao\PhpRedisTimeSeries\AggregationRule;
 use Palicao\PhpRedisTimeSeries\Client\RedisClient;
 use Palicao\PhpRedisTimeSeries\Client\RedisConnectionParams;
-use Palicao\PhpRedisTimeSeries\DateTimeUtils;
-use Palicao\PhpRedisTimeSeries\Filter;
-use Palicao\PhpRedisTimeSeries\Label;
-use Palicao\PhpRedisTimeSeries\Sample;
-use Palicao\PhpRedisTimeSeries\SampleWithLabels;
 use Palicao\PhpRedisTimeSeries\TimeSeries;
 use PHPUnit\Framework\TestCase;
 use Redis;