Remove asFormat methods.

sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriterV2.scala

@@ -358,56 +358,6 @@ trait CreateTableWriter[T] extends WriteConfigMethods[CreateTableWriter[T]] {
    */
   def using(provider: String): CreateTableWriter[T]
 
-  /**
-   * Use the "csv" provider.
-   *
-   * This is equivalent to:
-   * {{{
-   *   using("csv")
-   * }}}
-   */
-  def asCsv: CreateTableWriter[T] = using("csv")
-
-  /**
-   * Use the "text" provider.
-   *
-   * This is equivalent to:
-   * {{{
-   *   using("text")
-   * }}}
-   */
-  def asText: CreateTableWriter[T] = using("text")
-
-  /**
-   * Use the "json" provider.
-   *
-   * This is equivalent to:
-   * {{{
-   *   using("json")
-   * }}}
-   */
-  def asJson: CreateTableWriter[T] = using("json")
-
-  /**
-   * Use the "parquet" provider.
-   *
-   * This is equivalent to:
-   * {{{
-   *   using("parquet")
-   * }}}
-   */
-  def asParquet: CreateTableWriter[T] = using("parquet")
-
-  /**
-   * Use the "orc" provider.
-   *
-   * This is equivalent to:
-   * {{{
-   *   using("orc")
-   * }}}
-   */
-  def asOrc: CreateTableWriter[T] = using("orc")
-
   /**
    * Add a table property.
    */

sql/core/src/test/scala/org/apache/spark/sql/sources/v2/DataFrameWriterV2Suite.scala

@@ -275,56 +275,6 @@ class DataFrameWriterV2Suite extends QueryTest with SharedSparkSession with Befo
     assert(table.properties === Map("prop" -> "value").asJava)
   }
 
-  test("Create: asText") {
-    spark.table("source").writeTo("testcat.table_name").asText.create()
-
-    val table = catalog("testcat").asInstanceOf[TestInMemoryTableCatalog]
-        .loadTable(Identifier.of(Array(), "table_name"))
-
-    assert(table.name === "testcat.table_name")
-    assert(table.properties === Map("provider" -> "text").asJava)
-  }
-
-  test("Create: asCsv") {
-    spark.table("source").writeTo("testcat.table_name").asCsv.create()
-
-    val table = catalog("testcat").asInstanceOf[TestInMemoryTableCatalog]
-        .loadTable(Identifier.of(Array(), "table_name"))
-
-    assert(table.name === "testcat.table_name")
-    assert(table.properties === Map("provider" -> "csv").asJava)
-  }
-
-  test("Create: asJson") {
-    spark.table("source").writeTo("testcat.table_name").asJson.create()
-
-    val table = catalog("testcat").asInstanceOf[TestInMemoryTableCatalog]
-        .loadTable(Identifier.of(Array(), "table_name"))
-
-    assert(table.name === "testcat.table_name")
-    assert(table.properties === Map("provider" -> "json").asJava)
-  }
-
-  test("Create: asParquet") {
-    spark.table("source").writeTo("testcat.table_name").asParquet.create()
-
-    val table = catalog("testcat").asInstanceOf[TestInMemoryTableCatalog]
-        .loadTable(Identifier.of(Array(), "table_name"))
-
-    assert(table.name === "testcat.table_name")
-    assert(table.properties === Map("provider" -> "parquet").asJava)
-  }
-
-  test("Create: asOrc") {
-    spark.table("source").writeTo("testcat.table_name").asOrc.create()
-
-    val table = catalog("testcat").asInstanceOf[TestInMemoryTableCatalog]
-        .loadTable(Identifier.of(Array(), "table_name"))
-
-    assert(table.name === "testcat.table_name")
-    assert(table.properties === Map("provider" -> "orc").asJava)
-  }
-
   test("Create: identity partitioned table") {
     spark.table("source").writeTo("testcat.table_name").partitionedBy($"id").create()