Tests/HeredocNowdocCloserTest: remove overloaded "setUpBeforeClass" method

Follow up on 220 / commit 5aa4362 .

As the `tabWidth` setting is now available via the `AbstractMethodUnitTest`, the `initializeFile()` method no longer needs to be overloaded for this test.

Author: jrfnl

tests/Core/Tokenizer/HeredocNowdocCloserTest.php

@@ -9,9 +9,6 @@
 
 namespace PHP_CodeSniffer\Tests\Core\Tokenizer;
 
-use PHP_CodeSniffer\Config;
-use PHP_CodeSniffer\Ruleset;
-use PHP_CodeSniffer\Files\DummyFile;
 use PHP_CodeSniffer\Tests\Core\AbstractMethodUnitTest;
 
 /**
@@ -23,39 +20,6 @@ final class HeredocNowdocCloserTest extends AbstractMethodUnitTest
 {
 
 
-    /**
-     * Initialize & tokenize \PHP_CodeSniffer\Files\File with code from the test case file.
-     *
-     * {@internal This is a near duplicate of the original method. Only difference is that
-     * tab replacement is enabled for this test.}
-     *
-     * @beforeClass
-     *
-     * @return void
-     */
-    public static function initializeFile()
-    {
-        $config            = new Config();
-        $config->standards = ['PSR1'];
-        $config->tabWidth  = 4;
-
-        $ruleset = new Ruleset($config);
-
-        // Default to a file with the same name as the test class. Extension is property based.
-        $relativeCN     = str_replace(__NAMESPACE__, '', get_called_class());
-        $relativePath   = str_replace('\\', DIRECTORY_SEPARATOR, $relativeCN);
-        $pathToTestFile = realpath(__DIR__).$relativePath.'.'.static::$fileExtension;
-
-        // Make sure the file gets parsed correctly based on the file type.
-        $contents  = 'phpcs_input_file: '.$pathToTestFile.PHP_EOL;
-        $contents .= file_get_contents($pathToTestFile);
-
-        self::$phpcsFile = new DummyFile($contents, $ruleset, $config);
-        self::$phpcsFile->process();
-
-    }//end initializeFile()
-
-
     /**
      * Verify that leading (indent) whitespace in a heredoc/nowdoc closer token get the tab replacement treatment.
      *