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/src/downloader/fossil_downloader.rs b/crates/shirabe/src/downloader/fossil_downloader.rs
index b5e3cb7c..cdc5f268 100644
--- a/crates/shirabe/src/downloader/fossil_downloader.rs
+++ b/crates/shirabe/src/downloader/fossil_downloader.rs
@@ -13,7 +13,7 @@ use crate::util::Filesystem;
 use crate::util::ProcessExecutor;
 use indexmap::IndexMap;
 use shirabe_pcre::Preg;
-use shirabe_php_shim::{PhpMixed, RuntimeException, impl_php_class, php_regex};
+use shirabe_php_shim::{PhpMixed, RuntimeException, impl_php_class, php_regex, preg_split};
 
 #[derive(Debug)]
 pub struct FossilDownloader {
@@ -223,7 +223,7 @@ impl VcsDownloader for FossilDownloader {
         let lines: Vec<String> = if trimmed.is_empty() {
             vec![]
         } else {
-            Preg::split(php_regex!(r"{\r?\n}"), &trimmed)
+            preg_split(php_regex!(r"{\r?\n}"), &trimmed)
         };
 
         for line in lines {