Remove old GIF samples

tests/TestCase.php

@@ -3,53 +3,4 @@
 
 class TestCase extends \PHPUnit_Framework_TestCase
 {
-    protected $testGifs = [
-        'test1' => 'https://i.imgur.com/QWFJQR2.gif',
-        'test2' => 'https://i.imgur.com/eCSiYLY.gif',
-        'test3' => 'https://i.imgur.com/ay0AAt5.gif',
-        'test4' => 'https://i.imgur.com/NRv75UE.gif',
-        'test5' => 'https://i.imgur.com/a6u20G3.gif',
-        'test6' => 'https://i.imgur.com/pd32IDd.gif'
-    ];
-
-    public function setUp()
-    {
-        foreach ($this->testGifs as $name => $url) {
-            $path = __DIR__."/gifs/$name.gif";
-            if (file_exists($path)) {
-                continue;
-            }
-
-            $ch = curl_init($url);
-            $fp = fopen($path, 'w');
-            curl_setopt($ch, CURLOPT_FILE, $fp);
-            curl_exec($ch);
-            curl_close($ch);
-            fclose($fp);
-        }
-    }
-
-    protected function createDirOrClear($dir)
-    {
-        if (!is_dir($dir)) {
-            mkdir($dir, null, true);
-        } else {
-            foreach (glob("$dir/*") as $file) {
-                unlink($file);
-            }
-        }
-    }
-
-    protected function loadChecksums($checksumPath, &$checksums)
-    {
-        if (file_exists($checksumPath)) {
-            $hasChecksums = true;
-            $checksums = json_decode(file_get_contents($checksumPath), true);
-        } else {
-            $hasChecksums = false;
-            $checksums = [];
-        }
-
-        return $hasChecksums;
-    }
-}
+}