YJIT doesn't need rb_obj_ensure_iv_index_mapping

We should make this function static and remove it from YJIT bindings.

internal/variable.h

@@ -35,7 +35,6 @@ void rb_gvar_ractor_local(const char *name);
 static inline bool ROBJ_TRANSIENT_P(VALUE obj);
 static inline void ROBJ_TRANSIENT_SET(VALUE obj);
 static inline void ROBJ_TRANSIENT_UNSET(VALUE obj);
-uint32_t rb_obj_ensure_iv_index_mapping(VALUE obj, ID id);
 
 struct gen_ivtbl;
 int rb_gen_ivtbl_get(VALUE obj, ID id, struct gen_ivtbl **ivtbl);

variable.c

@@ -1449,7 +1449,7 @@ rb_init_iv_list(VALUE obj)
 // @note May raise when there are too many instance variables.
 // @note YJIT uses this function at compile time to simplify the work needed to
 //       access the variable at runtime.
-uint32_t
+static uint32_t
 rb_obj_ensure_iv_index_mapping(VALUE obj, ID id)
 {
     RUBY_ASSERT(RB_TYPE_P(obj, T_OBJECT));

yjit/bindgen/src/main.rs

@@ -304,7 +304,6 @@ fn main() {
 
         // From internal/variable.h
         .allowlist_function("rb_gvar_(get|set)")
-        .allowlist_function("rb_obj_ensure_iv_index_mapping")
 
         // From include/ruby/internal/intern/variable.h
         .allowlist_function("rb_attr_get")

yjit/src/cruby_bindings.inc.rs

@@ -1015,9 +1015,6 @@ extern "C" {
 extern "C" {
     pub fn rb_hash_resurrect(hash: VALUE) -> VALUE;
 }
-extern "C" {
-    pub fn rb_obj_ensure_iv_index_mapping(obj: VALUE, id: ID) -> u32;
-}
 extern "C" {
     pub fn rb_gvar_get(arg1: ID) -> VALUE;
 }