fix(deadline): drop redundant empty-rows break in 0080 batch loops

Author: vatsrahul1001

airflow-core/src/airflow/migrations/versions/0080_3_1_0_modify_deadline_callback_schema.py

@@ -99,9 +99,6 @@ def upgrade():
             .limit(batch_size)
         ).fetchall()
 
-        if not rows:
-            break
-
         batch = []
         for row in rows:
             path = row[1] or ""
@@ -190,9 +187,6 @@ def downgrade():
             .limit(batch_size)
         ).fetchall()
 
-        if not rows:
-            break
-
         batch = []
         for row in rows:
             cb = row[1]