chore(shirabe): remove ports of PHP @deprecated APIs

Composer does not use its own deprecated APIs internally, so drop their
Rust ports: whole deprecated classes, methods, constants, and field.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 0 insertions, 18 deletions

diff --git a/crates/shirabe/src/repository/pear_repository.rs b/crates/shirabe/src/repository/pear_repository.rs
deleted file mode 100644
index 1f0e29e..0000000
--- a/crates/shirabe/src/repository/pear_repository.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-//! ref: composer/src/Composer/Repository/PearRepository.php
-
-use super::ArrayRepository;
-use shirabe_php_shim::InvalidArgumentException;
-
-#[derive(Debug)]
-pub struct PearRepository {
-    inner: ArrayRepository,
-}
-
-impl PearRepository {
-    pub fn new() -> anyhow::Result<Self> {
-        Err(anyhow::anyhow!(InvalidArgumentException {
-            message: "The PEAR repository has been removed from Composer 2.x".to_string(),
-            code: 0,
-        }))
-    }
-}