Eliminate unused local variable

Author: sebastianbergmann

src/CodeCoverage/Report/HTML/Renderer/File.php

@@ -329,7 +329,6 @@ protected function renderSource(PHP_CodeCoverage_Report_Node_File $node)
         $i            = 1;
 
         foreach ($codeLines as $line) {
-            $numTests       = '';
             $trClass        = '';
             $popoverContent = '';
             $popoverTitle   = '';