Remove some code from ha_innodb.cc that was already enclosed in #if 0.

The code was related to replication and group commit, and it was
unreachable already as of MySQL 5.0.

Approved by Heikki

handler/ha_innodb.cc

@@ -1937,110 +1937,6 @@ retry:
 	DBUG_RETURN(0);
 }
 
-#if 0
-/* TODO: put the
-MySQL-4.1 functionality back to 5.0. This is needed to get InnoDB Hot Backup
-to work. */
-
-/*********************************************************************
-This is called when MySQL writes the binlog entry for the current
-transaction. Writes to the InnoDB tablespace info which tells where the
-MySQL binlog entry for the current transaction ended. Also commits the
-transaction inside InnoDB but does NOT flush InnoDB log files to disk.
-To flush you have to call innobase_commit_complete(). We have separated
-flushing to eliminate the bottleneck of LOCK_log in log.cc which disabled
-InnoDB's group commit capability. */
-static
-int
-innobase_report_binlog_offset_and_commit(
-/*=====================================*/
-				/* out: 0 */
-        handlerton *hton, /* in: Innodb handlerton */ 
-	THD*	thd,		/* in: user thread */
-	void*	trx_handle,	/* in: InnoDB trx handle */
-	char*	log_file_name,	/* in: latest binlog file name */
-	my_off_t end_offset)	/* in: the offset in the binlog file
-				   up to which we wrote */
-{
-	trx_t*	trx;
-
-	trx = (trx_t*)trx_handle;
-
-	ut_a(trx != NULL);
-
-	trx->mysql_log_file_name = log_file_name;
-	trx->mysql_log_offset = (ib_longlong)end_offset;
-
-	trx->flush_log_later = TRUE;
-
-	innobase_commit(hton, thd, TRUE);
-
-	trx->flush_log_later = FALSE;
-
-	return(0);
-}
-
-/***********************************************************************
-This function stores the binlog offset and flushes logs. */
-static
-void
-innobase_store_binlog_offset_and_flush_log(
-/*=======================================*/
-	char*		binlog_name,	/* in: binlog name */
-	longlong	offset)		/* in: binlog offset */
-{
-	mtr_t mtr;
-
-	assert(binlog_name != NULL);
-
-	/* Start a mini-transaction */
-	mtr_start_noninline(&mtr);
-
-	/* Update the latest MySQL binlog name and offset info
-	in trx sys header */
-
-	trx_sys_update_mysql_binlog_offset(
-		binlog_name,
-		offset,
-		TRX_SYS_MYSQL_LOG_INFO, &mtr);
-
-	/* Commits the mini-transaction */
-	mtr_commit(&mtr);
-
-	/* Synchronous flush of the log buffer to disk */
-	log_buffer_flush_to_disk();
-}
-
-/*********************************************************************
-This is called after MySQL has written the binlog entry for the current
-transaction. Flushes the InnoDB log files to disk if required. */
-static
-int
-innobase_commit_complete(
-/*=====================*/
-				/* out: 0 */
-	THD*	thd)		/* in: user thread */
-{
-	trx_t*	trx;
-
-	trx = thd_to_trx(thd);
-
-	if (trx && trx->active_trans) {
-
-		trx->active_trans = 0;
-
-		if (UNIV_UNLIKELY(srv_flush_log_at_trx_commit == 0)) {
-
-			return(0);
-		}
-
-		trx_commit_complete_for_mysql(trx);
-	}
-
-	return(0);
-}
-#endif
-
 /*********************************************************************
 Rolls back a transaction or the latest SQL statement. */
 static