Remove direct requires of parts of PHPUnit.

test/PredisShared.php

@@ -12,8 +12,6 @@ if (I_AM_AWARE_OF_THE_DESTRUCTIVE_POWER_OF_THIS_TEST_SUITE !== true) {
     );
 }
 
-require_once 'PHPUnit/Framework.php';
-
 if (!function_exists('array_union')) {
     function array_union(Array $a, Array $b) {
         return array_merge($a, array_diff($b, $a));