message: Remove set_tapos declaration
  (not used any more)
diff: @@ -83,8 +83,6 @@ namespace eosio { namespace testing {
  transaction_trace push_action( const account_name& code, const action_name& acttype, const account_name& actor, const variant_object& data, uint32_t expiration = DEFAULT_EXPIRATION_DELTA, uint32_t delay_sec = 0 );
  transaction_trace push_action( const account_name& code, const action_name& acttype, const vector<account_name>& actors, const variant_object& data, uint32_t expiration = DEFAULT_EXPIRATION_DELTA, uint32_t delay_sec = 0 );
  - void set_tapos( signed_transaction& trx, uint32_t expiration = DEFAULT_EXPIRATION_DELTA ) const;
  -
  void set_transaction_headers(signed_transaction& trx,
  uint32_t expiration = DEFAULT_EXPIRATION_DELTA,
  uint32_t delay_sec = 0)const;
  