[BUGFIX] Drop test that passes in the wrong type

`OutputFormat::spaceAfterListArgumentSeparator` is expected to
be a string, not an array.

This was discovered by adding dedicated, strictly typed
property accessors for `OutputFormat`.

Author: oliverklee

tests/OutputFormatTest.php

@@ -96,23 +96,6 @@ public function spaceAfterListArgumentSeparator(): void
         );
     }
 
-    /**
-     * @test
-     */
-    public function spaceAfterListArgumentSeparatorComplex(): void
-    {
-        self::assertSame(
-            '.main, .test {font: italic normal bold 16px/1.2 "Helvetica",	Verdana,	sans-serif;background: white;}'
-            . "\n@media screen {.main {background-size: 100% 100%;font-size: 1.3em;background-color: #fff;}}",
-            $this->document->render(OutputFormat::create()->setSpaceAfterListArgumentSeparator([
-                'default' => ' ',
-                ',' => "\t",
-                '/' => '',
-                ' ' => '',
-            ]))
-        );
-    }
-
     /**
      * @test
      */