Revert "[KYUUBI #1458] Delta lake table columns won't show up in DBea…

…ver."

This reverts commit b87d206.

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/shim/CatalogShim_v2_4.scala

@@ -139,13 +139,7 @@ class CatalogShim_v2_4 extends SparkCatalogShim {
     databases.flatMap { db =>
       val identifiers = catalog.listTables(db, tablePattern, includeLocalTempViews = true)
       catalog.getTablesByName(identifiers).flatMap { t =>
-        val tableSchema =
-          if (t.provider.getOrElse("").equalsIgnoreCase("delta")) {
-            spark.table(t.identifier.table).schema
-          } else {
-            t.schema
-          }
-        tableSchema.zipWithIndex.filter(f => columnPattern.matcher(f._1.name).matches())
+        t.schema.zipWithIndex.filter(f => columnPattern.matcher(f._1.name).matches())
           .map { case (f, i) => toColumnResult(catalogName, t.database, t.identifier.table, f, i) }
       }
     }