Address comments in unit test and rebase

Author: c21

sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala

@@ -2661,18 +2661,6 @@ object SQLConf {
       .checkValue(_ > 0, "The difference must be positive.")
       .createWithDefault(4)
 
-  val COALESCE_BUCKETS_IN_SHUFFLED_HASH_JOIN_MAX_BUCKET_RATIO =
-    buildConf("spark.sql.bucketing.coalesceBucketsInShuffledHashJoin.maxBucketRatio")
-      .doc("The ratio of the number of two buckets being coalesced should be less than or " +
-        "equal to this value for bucket coalescing to be applied. This configuration only " +
-        s"has an effect when '${COALESCE_BUCKETS_IN_JOIN_ENABLED.key}' is set to true. " +
-        "Note as coalescing reduces parallelism, there might be a higher risk for " +
-        "out of memory error at shuffled hash join build side.")
-      .version("3.1.0")
-      .intConf
-      .checkValue(_ > 0, "The difference must be positive.")
-      .createWithDefault(2)
-
   val BROADCAST_HASH_JOIN_OUTPUT_PARTITIONING_EXPAND_LIMIT =
     buildConf("spark.sql.execution.broadcastHashJoin.outputPartitioningExpandLimit")
       .internal()
@@ -2683,7 +2671,7 @@ object SQLConf {
       .intConf
       .checkValue(_ >= 0, "The value must be non-negative.")
       .createWithDefault(8)
-  
+
   /**
    * Holds information about keys that have been deprecated.
    *

sql/core/src/test/scala/org/apache/spark/sql/execution/bucketing/CoalesceBucketsInJoinSuite.scala

@@ -128,16 +128,11 @@ class CoalesceBucketsInJoinSuite extends SQLTestUtils with SharedSparkSession {
     }
 
     withSQLConf(SQLConf.COALESCE_BUCKETS_IN_JOIN_ENABLED.key -> "false") {
-      run(JoinSetting(
-        RelationSetting(4, None), RelationSetting(8, None), joinOperator = BROADCAST_HASH_JOIN))
       run(JoinSetting(
         RelationSetting(4, None), RelationSetting(8, None), joinOperator = SORT_MERGE_JOIN))
       run(JoinSetting(
         RelationSetting(4, None), RelationSetting(8, None), joinOperator = SHUFFLED_HASH_JOIN,
         shjBuildSide = Some(BuildLeft)))
-      run(JoinSetting(
-        RelationSetting(4, None), RelationSetting(8, None), joinOperator = SHUFFLED_HASH_JOIN,
-        shjBuildSide = Some(BuildRight)))
     }
   }