Remove superfluous imports

Author: sebastianbergmann

src/CodeCoverage.php

@@ -25,8 +25,6 @@
 use SebastianBergmann\CodeCoverage\Data\ProcessedCodeCoverageData;
 use SebastianBergmann\CodeCoverage\Data\RawCodeCoverageData;
 use SebastianBergmann\CodeCoverage\Driver\Driver;
-use SebastianBergmann\CodeCoverage\Driver\PcovDriver;
-use SebastianBergmann\CodeCoverage\Driver\XdebugDriver;
 use SebastianBergmann\CodeCoverage\Node\Builder;
 use SebastianBergmann\CodeCoverage\Node\Directory;
 use SebastianBergmann\CodeCoverage\StaticAnalysis\CachingFileAnalyser;