bug #15020 [Profiler] Remove unused import (sebpacz)

This PR was merged into the 5.2 branch.

Discussion
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[Profiler] Remove unused import

I removed the DataCollector class import because it has been replaced with the AbstractDataCollector class.

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Commits
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1834da9 Update data_collector.rst

Author: wouterj

profiler/data_collector.rst

@@ -31,7 +31,6 @@ request::
     use Symfony\Bundle\FrameworkBundle\DataCollector\AbstractDataCollector;
     use Symfony\Component\HttpFoundation\Request;
     use Symfony\Component\HttpFoundation\Response;
-    use Symfony\Component\HttpKernel\DataCollector\DataCollector;
 
     class RequestCollector extends AbstractDataCollector
     {