Remove unneeded TextTest class

tests/include/TextTest.php

@@ -1,26 +0,0 @@
-<?php
-/**
- * TextTest class.
- */
-
-namespace Friendica\Test;
-
-use Friendica\Model\Group;
-use PHPUnit\Framework\TestCase;
-
-/**
- * Tests for text functions.
- */
-class TextTest extends TestCase
-{
-	/**
-	 * test hex2bin and reverse
-	 */
-	public function testHex2Bin()
-	{
-		$this->assertEquals(-3, hex2bin(bin2hex(-3)));
-		$this->assertEquals(0, hex2bin(bin2hex(0)));
-		$this->assertEquals(12, hex2bin(bin2hex(12)));
-		$this->assertEquals(PHP_INT_MAX, hex2bin(bin2hex(PHP_INT_MAX)));
-	}
-}