[SPARK-46009][SQL][FOLLOWUP] Remove unused golden file

### What changes were proposed in this pull request?
This PR propose to remove unused golden file.

### Why are the changes needed?
apache#46272 removed unused `PERCENTILE_CONT` and `PERCENTILE_DISC` in g4.
But I made a mistake and submitted my local test code.

### Does this PR introduce _any_ user-facing change?
'No'.

### How was this patch tested?
GA

### Was this patch authored or co-authored using generative AI tooling?
'No'.

Closes apache#46385 from beliefer/SPARK-46009_followup3.

Authored-by: beliefer <beliefer@163.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>