Remove an unused argument of `str_with_class()`

src/string.c

@@ -83,7 +83,7 @@ str_new(mrb_state *mrb, const char *p, size_t len)
 }
 
 static inline void
-str_with_class(mrb_state *mrb, struct RString *s, mrb_value obj)
+str_with_class(struct RString *s, mrb_value obj)
 {
   s->c = mrb_str_ptr(obj)->c;
 }
@@ -93,7 +93,7 @@ mrb_str_new_empty(mrb_state *mrb, mrb_value str)
 {
   struct RString *s = str_new(mrb, 0, 0);
 
-  str_with_class(mrb, s, str);
+  str_with_class(s, str);
   return mrb_obj_value(s);
 }
 
@@ -830,7 +830,7 @@ mrb_str_times(mrb_state *mrb, mrb_value self)
 
   len = RSTRING_LEN(self)*times;
   str2 = str_new(mrb, 0, len);
-  str_with_class(mrb, str2, self);
+  str_with_class(str2, self);
   p = RSTR_PTR(str2);
   if (len > 0) {
     n = RSTRING_LEN(self);
@@ -1011,7 +1011,7 @@ mrb_str_dup(mrb_state *mrb, mrb_value str)
   struct RString *s = mrb_str_ptr(str);
   struct RString *dup = str_new(mrb, 0, 0);
 
-  str_with_class(mrb, dup, str);
+  str_with_class(dup, str);
   return str_replace(mrb, dup, s);
 }
 
@@ -2561,7 +2561,7 @@ mrb_str_dump(mrb_state *mrb, mrb_value str)
   }
 
   result = str_new(mrb, 0, len);
-  str_with_class(mrb, result, str);
+  str_with_class(result, str);
   p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
   q = RSTR_PTR(result);
   *q++ = '"';