mrb_hash_delete_key(), mrb_hash_keys() : Declare as static.

mrb_check_hash_type(): Remove as no implementation.

include/mruby/hash.h

@@ -26,10 +26,7 @@ mrb_value mrb_hash_new(mrb_state *mrb);
 void mrb_hash_set(mrb_state *mrb, mrb_value hash, mrb_value key, mrb_value val);
 mrb_value mrb_hash_get(mrb_state *mrb, mrb_value hash, mrb_value key);
 mrb_value mrb_hash_fetch(mrb_state *mrb, mrb_value hash, mrb_value key, mrb_value def);
-mrb_value mrb_hash_delete_key(mrb_state *mrb, mrb_value hash, mrb_value key);
-mrb_value mrb_hash_keys(mrb_state *mrb, mrb_value hash);
 mrb_value mrb_hash(mrb_state *mrb, mrb_value obj);
-mrb_value mrb_check_hash_type(mrb_state *mrb, mrb_value self);
 
 /* RHASH_TBL allocates st_table if not available. */
 #define RHASH(obj)   ((struct RHash*)((obj).value.p))

src/hash.c

@@ -488,7 +488,7 @@ mrb_hash_set_default_proc(mrb_state *mrb, mrb_value hash)
   return ifnone;
 }
 
-mrb_value
+static mrb_value
 mrb_hash_delete_key(mrb_state *mrb, mrb_value hash, mrb_value key)
 {
   khash_t(ht) *h = RHASH_TBL(hash);
@@ -965,7 +965,7 @@ mrb_hash_to_hash(mrb_state *mrb, mrb_value hash)
  *
  */
 
-mrb_value
+static mrb_value
 mrb_hash_keys(mrb_state *mrb, mrb_value hash)
 {
   khash_t(ht) *h = RHASH_TBL(hash);