move declaration of mrb_irep_remove_lv from dump.h to irep.h

include/mruby/dump.h

@@ -31,7 +31,6 @@ MRB_API mrb_value mrb_load_irep_file(mrb_state*,FILE*);
 MRB_API mrb_value mrb_load_irep_file_cxt(mrb_state*, FILE*, mrbc_context*);
 #endif
 MRB_API mrb_irep *mrb_read_irep(mrb_state*, const uint8_t*);
-void mrb_irep_remove_lv(mrb_state *mrb, mrb_irep *irep);
 
 /* dump/load error code
  *

include/mruby/irep.h

@@ -56,6 +56,7 @@ void mrb_irep_free(mrb_state*, struct mrb_irep*);
 void mrb_irep_incref(mrb_state*, struct mrb_irep*);
 void mrb_irep_decref(mrb_state*, struct mrb_irep*);
 void mrb_irep_cutref(mrb_state*, struct mrb_irep*);
+void mrb_irep_remove_lv(mrb_state *mrb, mrb_irep *irep);
 
 MRB_END_DECL