Remove unused symbols.

src/net.cc

@@ -21,13 +21,9 @@ using namespace node;
 #define RAW_SYMBOL            String::NewSymbol("raw")
 #define ASCII_SYMBOL          String::NewSymbol("ascii")
 
-#define ENCODING_SYMBOL       String::NewSymbol("encoding")
-#define TIMEOUT_SYMBOL        String::NewSymbol("timeout")
 #define SERVER_SYMBOL         String::NewSymbol("server")
 #define REMOTE_ADDRESS_SYMBOL String::NewSymbol("remoteAddress")
 
-#define PROTOCOL_SYMBOL           String::NewSymbol("protocol")
-
 #define READY_STATE_SYMBOL  String::NewSymbol("readyState")
 #define OPEN_SYMBOL         String::NewSymbol("open")
 #define OPENING_SYMBOL      String::NewSymbol("opening")

src/process.cc

@@ -11,9 +11,6 @@
 using namespace v8;
 using namespace node;
 
-#define ON_ERROR_SYMBOL   String::NewSymbol("onError")
-#define ON_OUTPUT_SYMBOL  String::NewSymbol("onOutput")
-#define ON_EXIT_SYMBOL    String::NewSymbol("onExit")
 #define PID_SYMBOL        String::NewSymbol("pid")
 
 /* defines for the parent side */