fixes requested by Bart

contracts/eosiolib/asset.hpp

@@ -209,19 +209,5 @@ namespace eosio {
       EOSLIB_SERIALIZE( extended_asset, (amount)(symbol)(contract) )
    };
 
-   struct token_identity {
-      symbol_name  symbol;
-      account_name contract;
-
-      EOSLIB_SERIALIZE( token_identity, (symbol)(contract) )
-   };
-
-   struct extended_price {
-      double ratio = 0.0;
-      token_identity base;
-      token_identity quote;
-
-      EOSLIB_SERIALIZE( extended_price, (ratio)(base)(quote) )
-   };
 
 } /// namespace eosio 

contracts/exchange/CMakeLists.txt

 file(GLOB ABI_FILES "*.abi")
 add_wast_executable(TARGET exchange
   INCLUDE_FOLDERS "${STANDARD_INCLUDE_FOLDERS}"
-  LIBRARIES libc++ libc eosiolib libc libc++
+  LIBRARIES libc++ libc eosiolib
   DESTINATION_FOLDER ${CMAKE_CURRENT_BINARY_DIR}
 )
 configure_file("${ABI_FILES}" "${CMAKE_CURRENT_BINARY_DIR}" COPYONLY)