You can disable flashback archiving with alter table
clause:
alter table YOUR_TABLE_NAME no flashback archive;
It's possible also to limit archive to specified size. To do that you need to create flashback archive designated to this table with desired retention and optionally size quota:
create flashback archive YOUR_TABLE_ARCHIVE tablespace SOME_TABLESPACE quota 512M retention 1 DAY;
Then assign new archive to table:
alter table YOUR_TABLE_NAME flashback archive YOUR_TABLE_ARCHIVE;
Examine Oracle documentation to check additional requirements. E.g. you need FLASHBACK ARCHIVE ADMINSTER
privilege to execute statement above.