[cff] Remove op_str_t nop init/fini

src/hb-cff-interp-common.hh

@@ -518,9 +518,6 @@ struct arg_stack_t : cff_stack_t<ARG, 513>
 /* an operator prefixed by its operands in a byte string */
 struct op_str_t
 {
-  void init () {}
-  void fini () {}
-
   op_code_t  op;
   byte_str_t str;
 };

src/hb-subset-cff-common.hh

@@ -299,15 +299,12 @@ struct parsed_cs_op_t : op_str_t
 {
   void init (unsigned int subr_num_ = 0)
   {
-    op_str_t::init ();
     subr_num = subr_num_;
     drop_flag = false;
     keep_flag = false;
     skip_flag = false;
   }
 
-  void fini () { op_str_t::fini (); }
-
   bool for_drop () const { return drop_flag; }
   void set_drop ()       { if (!for_keep ()) drop_flag = true; }