refactor(autoload): drop dead APCu cache from ClassLoader

apcu_fetch/apcu_add only ran when apcuPrefix was non-null, but
Composer never calls setApcuPrefix on the loaders it instantiates
itself; the prefix is only emitted into the generated target-project
autoload_real.php. So the cache branches were unreachable in Shirabe's
execution paths. Remove the apcu shim and the now-dead lookups.

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

2 files changed, 0 insertions, 13 deletions

diff --git a/crates/shirabe-php-shim/src/apcu.rs b/crates/shirabe-php-shim/src/apcu.rs
deleted file mode 100644
index 699f66e..0000000
--- a/crates/shirabe-php-shim/src/apcu.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use crate::PhpMixed;
-
-pub fn apcu_add(key: &str, var: PhpMixed) -> bool {
-    let _ = (key, var);
-    todo!()
-}
-
-pub fn apcu_fetch(key: &str, success: &mut bool) -> PhpMixed {
-    let _ = (key, success);
-    todo!()
-}
diff --git a/crates/shirabe-php-shim/src/lib.rs b/crates/shirabe-php-shim/src/lib.rs
index a359275..110dc50 100644
--- a/crates/shirabe-php-shim/src/lib.rs
+++ b/crates/shirabe-php-shim/src/lib.rs
@@ -1,4 +1,3 @@
-mod apcu;
 mod array;
 mod compress;
 mod curl;
@@ -25,7 +24,6 @@ mod url;
 mod var;
 mod zip;
 
-pub use apcu::*;
 pub use array::*;
 pub use compress::*;
 pub use curl::*;