Revert "Add bogus tests"

This reverts commit 2c6fc10.

Author: vmcj

webapp/tests/Twig/TwigExtensionTest.php

@@ -386,20 +386,6 @@ public function testConvertToHexUnknown(): void
         self::assertNull(Utils::convertToHex('#12346h'));
     }
 
-    public function testApcaContrast(): void
-    {
-        self::assertEquals('#ffffff', Utils::apcaContrast("#fff", "#fff"));
-    }
-
-    public function testHexToForegroundAndBorder(): void
-    {
-        self::assertEquals(['#ffffff', '#ffffff'], Utils::hexToForegroundAndBorder("#fff"));
-        self::assertEquals(['#ffffff', '#ffffff'], Utils::hexToForegroundAndBorder("#fedc"));
-        self::assertEquals(['#ffffff', '#ffffff'], Utils::hexToForegroundAndBorder("#001122"));
-        self::assertEquals(['#ffffff', '#ffffff'], Utils::hexToForegroundAndBorder("#11223344"));
-        self::assertEquals(['#ffffff', '#ffffff'], Utils::hexToForegroundAndBorder("#0123"));
-    }
-
     /**
      * Test function that converts colour hex notation to (nearest) name.
      * If value is not hexadecimal, return it unchanged.