refactor(preg): replace Preg::split*() with shim preg_split*()

preg_split2()'s limit was always -1 and its flags were always either 0 or
PREG_SPLIT_DELIM_CAPTURE alone, so both arguments are gone: the shim now
exposes preg_split() and preg_split_delim_capture() over a shared
preg_split_impl(). That leaves Preg::split()/split4() as bare
pass-throughs, so callers use the shim functions directly and the wrappers
are dropped along with the now-unreferenced PREG_SPLIT_* constants.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/crates/shirabe/tests/common/io_mock.rs b/crates/shirabe/tests/common/io_mock.rs
index 7ea3059c..c1bd5e00 100644
--- a/crates/shirabe/tests/common/io_mock.rs
+++ b/crates/shirabe/tests/common/io_mock.rs
@@ -6,7 +6,7 @@ use shirabe::io::io_interface;
 use shirabe::io::{IOInterface, IOInterfaceImmutable, IOInterfaceMutable};
 use shirabe::util::platform::Platform;
 use shirabe_pcre::Preg;
-use shirabe_php_shim::{PHP_EOL, PhpMixed, php_regex, preg_quote};
+use shirabe_php_shim::{PHP_EOL, PhpMixed, php_regex, preg_quote, preg_split};
 use shirabe_symfony_console::output::output_interface;
 use std::collections::VecDeque;
 
@@ -126,7 +126,7 @@ impl IOMock {
         };
 
         if !expectations.is_empty() {
-            let mut lines: VecDeque<String> = Preg::split(php_regex!("{\r?\n}"), &output).into();
+            let mut lines: VecDeque<String> = preg_split(php_regex!("{\r?\n}"), &output).into();
             let mut auth_log: VecDeque<(String, String, Option<String>)> =
                 self.auth_log.clone().into();