Fix PHPCS/PHPMD errors

Author: Progi1984

tests/PhpPowerpoint/Tests/Writer/PowerPoint2007/ChartTest.php

@@ -60,22 +60,14 @@ public function testConstructException()
      */
     public function testPlotAreaBadType()
     {
-        $seriesData = array(
-    		'A' => 1,
-    		'B' => 2,
-    		'C' => 4,
-    		'D' => 3,
-    		'E' => 2,
-        );
-        
         $oPHPPowerPoint = new PhpPowerpoint();
         $oSlide = $oPHPPowerPoint->getActiveSlide();
         $oShape = $oSlide->createChartShape();
         $oShape->setResizeProportional(false)->setHeight(550)->setWidth(700)->setOffsetX(120)->setOffsetY(80);
         $stub = $this->getMockForAbstractClass('PhpOffice\PhpPowerpoint\Shape\Chart\AbstractType');
         $oShape->getPlotArea()->setType($stub);
 
-        $oXMLDoc = TestHelperDOCX::getDocument($oPHPPowerPoint, 'PowerPoint2007');
+        TestHelperDOCX::getDocument($oPHPPowerPoint, 'PowerPoint2007');
     }
 
     public function testTypeBar3D()

tests/PhpPowerpoint/Tests/Writer/PowerPoint2007/SlideTest.php

@@ -260,7 +260,6 @@ public function testLine()
     {
         $valEmu10 = Drawing::pixelsToEmu(10);
         $valEmu90 = Drawing::pixelsToEmu(90);
-        $valEmu100 = Drawing::pixelsToEmu(100);
 
         $phpPowerPoint = new PhpPowerpoint();
         $oSlide = $phpPowerPoint->getActiveSlide();