Remove obsolete version checks in tests

Author: weltling

ext/pcre/tests/bug52971.phpt

@@ -1,7 +1,5 @@
 --TEST--
 Bug #52971 (PCRE-Meta-Characters not working with utf-8)
---SKIPIF--
-<?php if ((double)PCRE_VERSION < 8.1) die('skip PCRE_VERSION >= 8.1 is required!'); ?>
 --FILE--
 <?php
 

ext/pcre/tests/bug70232.phpt

@@ -1,11 +1,5 @@
 --TEST--
 Bug #70232 (Incorrect bump-along behavior with \K and empty string match)
---SKIPIF--
-<?php
-if (version_compare(explode(' ', PCRE_VERSION)[0], '8.0', 'lt')) {
-    die("skip this test requires libpcre >= 8.0");
-}
-?>
 --FILE--
 <?php
 $pattern = '~(?: |\G)\d\B\K~';

ext/pcre/tests/marks.phpt

@@ -1,11 +1,5 @@
 --TEST--
 Test support for PCRE marks
---SKIPIF--
-<?php
-if (version_compare(PCRE_VERSION, '8.1', '<')) {
-    die('skip PCRE_VERSION >= 8.1 is required for MARK support');
-}
-?>
 --FILE--
 <?php