Remove deprecated code

pekko/src/main/scala/anorm/PekkoStream.scala

@@ -24,54 +24,6 @@ import org.apache.pekko.stream.scaladsl.{ Source }
  */
 object PekkoStream {
 
-  /**
-   * Returns the rows parsed from the `sql` query as a reactive source.
-   *
-   * $materialization
-   *
-   * @tparam T the type of the result elements
-   * @param sql $sqlParam
-   * @param parser the result (row) parser
-   * @param as $columnAliaserParam
-   * @param m $materializerParam
-   * @param connection $connectionParam
-   *
-   * {{{
-   * import java.sql.Connection
-   *
-   * import scala.concurrent.Future
-   *
-   * import org.apache.pekko.stream.Materializer
-   * import org.apache.pekko.stream.scaladsl.Source
-   *
-   * import anorm._
-   *
-   * def resultSource(implicit m: Materializer, con: Connection): Source[String, Future[Int]] = PekkoStream.source(SQL"SELECT * FROM Test", SqlParser.scalar[String], ColumnAliaser.empty)
-   * }}}
-   */
-  @SuppressWarnings(Array("UnusedMethodParameter"))
-  def source[T](sql: => Sql, parser: RowParser[T], as: ColumnAliaser)(implicit
-      @deprecated("No longer required (will be removed)", "2.5.4") m: Materializer,
-      con: Connection
-  ): Source[T, Future[Int]] = Source.fromGraph(new ResultSource[T](con, sql, as, parser))
-
-  /**
-   * Returns the rows parsed from the `sql` query as a reactive source.
-   *
-   * $materialization
-   *
-   * @tparam T the type of the result elements
-   * @param sql $sqlParam
-   * @param parser the result (row) parser
-   * @param m $materializerParam
-   * @param connection $connectionParam
-   */
-  @SuppressWarnings(Array("UnusedMethodParameter"))
-  def source[T](sql: => Sql, parser: RowParser[T])(implicit
-      @deprecated("No longer required (will be removed)", "2.5.4") m: Materializer,
-      con: Connection
-  ): Source[T, Future[Int]] = source[T](sql, parser, ColumnAliaser.empty)
-
   /**
    * Returns the result rows from the `sql` query as an enumerator.
    * This is equivalent to `source[Row](sql, RowParser.successful, as)`.