diff --git a/src/Helpers/InputReader.php b/src/Helpers/InputReader.php
index 0a3564da..461e90c0 100644
--- a/src/Helpers/InputReader.php
+++ b/src/Helpers/InputReader.php
@@ -25,16 +25,6 @@ final class InputReader extends \ArrayObject
 		return parent::offsetGet($index);
 	}
 
-	public function decodeBase64($base64string)
-	{
-		if ($base64string === null)
-			return null;
-		$commaPosition = strpos($base64string, ',');
-		if ($commaPosition !== null)
-			$base64string = substr($base64string, $commaPosition + 1);
-		return base64_decode($base64string);
-	}
-
 	public function readFile($fileName)
 	{
 		if (!isset($_FILES[$fileName]))
diff --git a/tests/Helpers/InputReaderTest.php b/tests/Helpers/InputReaderTest.php
deleted file mode 100644
index fe81d4f9..00000000
--- a/tests/Helpers/InputReaderTest.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-namespace Szurubooru\Tests\Helpers;
-use Szurubooru\Helpers\InputReader;
-use Szurubooru\Tests\AbstractTestCase;
-
-final class InputReaderTest extends AbstractTestCase
-{
-	public function testDecodingBase64()
-	{
-		$inputReader = new InputReader();
-		$actual = $inputReader->decodeBase64('data:text/plain,YXdlc29tZSBkb2c=');
-		$expected = 'awesome dog';
-		$this->assertEquals($expected, $actual);
-	}
-
-	public function testDecodingEmptyBase64()
-	{
-		$inputReader = new InputReader();
-		$this->assertNull($inputReader->decodeBase64($inputReader->iDontEvenExist));
-	}
-}