Clean out unused member

Author: aafemt

src/dsql/DsqlStatements.cpp

@@ -154,9 +154,6 @@ void DsqlDmlStatement::dsqlPass(thread_db* tdbb, DsqlCompilerScratch* scratch, n
 
 	unsigned messageNumber = 0;
 
-	for (auto message : ports)
-		message->msg_buffer_number = messageNumber++;
-
 	// have the access method compile the statement
 
 #ifdef DSQL_DEBUG

src/dsql/dsql.h

@@ -542,7 +542,6 @@ class dsql_msg : public Firebird::PermanentStorage
 
 	Firebird::Array<dsql_par*> msg_parameters;	// Parameter list
 	USHORT msg_number = 0;			// Message number
-	USHORT msg_buffer_number = 0;	// Message buffer number (used instead of msg_number for blob msgs)
 	ULONG msg_length = 0;			// Message length
 	USHORT msg_parameter = 0;		// Next parameter number
 	USHORT msg_index = 0;			// Next index into SQLDA