Description / Background

DefaultCompactionRunnerFactory is throwing an Exception if Java compactions are used and an aggregation is specified.

Steps to reproduce

1. Create a table with an aggregation specified, i.e. with AGGREGATORS as the classname and an appropriate configuration.
2. Set the data engine to java
3. When a compaction occurs, it will fail with an exception stating datafusion only iterators can't be used with Java.

Expected behaviour

Aggregation compaction should happen in Java

Technical Notes / Implementation Details

Remove un-needed check from DefaultCompactionRunnnerFactory

Screenshots/Logs

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