Remove the prototypes of some functions inside #if 0.

The function definitions were removed in r1746.

handler/ha_innodb.h

@@ -243,17 +243,3 @@ int thd_non_transactional_update(const MYSQL_THD thd);
 */
 int thd_binlog_format(const MYSQL_THD thd);
 }
-
-/*
-  don't delete it - it may be re-enabled later
-  as an optimization for the most common case InnoDB+binlog
-*/
-#if 0
-int innobase_report_binlog_offset_and_commit(
-	THD*	thd,
-	void*	trx_handle,
-	char*	log_file_name,
-	my_off_t end_offset);
-int innobase_commit_complete(void* trx_handle);
-void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
-#endif