Revert "Fix a minor potential issue when rebatching for GpuArrowEvalP…

…ythonExec (#5995)" (#7006)

This reverts commit 4a313e7.

Signed-off-by: Bobby Wang <wbo4958@gmail.com>

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/execution/python/GpuArrowEvalPythonExec.scala

@@ -150,7 +150,7 @@ class RebatchingRoundoffIterator(
 
     val rc: Long = combined.numRows()
 
-    if (rc <= targetRoundoff) {
+    if (rc % targetRoundoff == 0 || rc < targetRoundoff) {
       return combined
     }