Update mmtk to no longer free obj_id_table

Author: byroot

gc/mmtk/mmtk.h

@@ -68,7 +68,6 @@ typedef struct MMTk_RubyUpcalls {
     void (*update_global_tables)(int tbl_idx);
     int (*global_tables_count)(void);
     void (*update_finalizer_table)(void);
-    void (*update_obj_id_tables)(void);
 } MMTk_RubyUpcalls;
 
 typedef struct MMTk_RawVecOfObjRef {

gc/mmtk/src/abi.rs

@@ -322,7 +322,6 @@ pub struct RubyUpcalls {
     pub update_global_tables: extern "C" fn(tbl_idx: c_int),
     pub global_tables_count: extern "C" fn() -> c_int,
     pub update_finalizer_table: extern "C" fn(),
-    pub update_obj_id_tables: extern "C" fn(),
 }
 
 unsafe impl Sync for RubyUpcalls {}

gc/mmtk/src/weak_proc.rs

@@ -185,7 +185,6 @@ struct UpdateFinalizerObjIdTables;
 impl GlobalTableProcessingWork for UpdateFinalizerObjIdTables {
     fn process_table(&mut self) {
         (crate::upcalls().update_finalizer_table)();
-        (crate::upcalls().update_obj_id_tables)();
     }
 }
 impl GCWork<Ruby> for UpdateFinalizerObjIdTables {