CI: remove leftover Cirrus CI references

Follow-up to php#16822, now that php-src no longer uses
Cirrus CI, some small leftover references to Cirrus CI and some
tests that were skipped on Cirrus CI can now be adjusted.

Author: Ayesh

.github/workflows/push.yml

@@ -9,8 +9,6 @@ on:
       - '**/README.*'
       - CONTRIBUTING.md
       - CODING_STANDARDS.md
-      - .cirrus.yml
-      - .circleci/**
     branches:
       - PHP-8.1
       - PHP-8.2

docs/release-process.md

@@ -54,7 +54,6 @@ releases.
 
 3. Ensure that the relevant tests on CI are green.
 
-   - https://cirrus-ci.com/github/php/php-src
    - https://github.com/php/php-src/actions
 
    > 💡 **Tip** \

ext/sockets/tests/socket_sendto_zerocopy.phpt

@@ -11,8 +11,8 @@ if (!defined("SO_ZEROCOPY")) {
 if (strpos($arch, 'ppc') !== false || strpos($arch, 'powerpc') !== false) {
     die('skip not for powerpc arch');
 }
-if (getenv('CIRRUS_CI') && strpos($arch, 'aarch64') !== false) {
-    die('xfail Broken on Cirrus + arm');
+if (strpos($arch, 'aarch64') !== false) {
+    die('xfail Broken on arm');
 }
 ?>
 --FILE--

ext/standard/tests/file/disk_free_space_basic.phpt

@@ -1,9 +1,5 @@
 --TEST--
 Test disk_free_space and its alias diskfreespace() functions : basic functionality
---SKIPIF--
-<?php
-if (getenv('CIRRUS_CI')) die('skip Inaccurate on Cirrus');
-?>
 --INI--
 memory_limit=32M
 --FILE--