remove imp macro. prepare Scala 3

Author: xuwei-k

core/shared/src/main/scala/kantan/csv/CsvSink.scala

@@ -73,7 +73,7 @@ object CsvSink {
     * }}}
     */
   def apply[A](implicit ev: CsvSink[A]): CsvSink[A] =
-    macro imp.summon[CsvSink[A]]
+    ev
 
   /** Turns the specified function into a [[CsvSink]].
     *

core/shared/src/main/scala/kantan/csv/CsvSource.scala

@@ -242,7 +242,7 @@ object CsvSource {
     * This is basically a less verbose, slightly faster version of `implicitly`.
     */
   def apply[A](implicit ev: CsvSource[A]): CsvSource[A] =
-    macro imp.summon[CsvSource[A]]
+    ev
 
   /** Turns the specified function into a [[CsvSource]].
     *

core/shared/src/main/scala/kantan/csv/HeaderDecoder.scala

@@ -59,7 +59,7 @@ object HeaderDecoder extends GeneratedHeaderDecoders {
 
   /** Summons an implicit instance of [[HeaderDecoder]] if one can be found, fails compilation otherwise. */
   def apply[A](implicit ev: HeaderDecoder[A]): HeaderDecoder[A] =
-    macro imp.summon[HeaderDecoder[A]]
+    ev
 
   private[csv] def determineRowMappings(requiredHeader: Seq[String], csvHeader: Seq[String]): DecodeResult[Seq[Int]] =
     requiredHeader.foldLeft((List.empty[String], List.empty[Int])) { case ((missing, found), header) =>

core/shared/src/main/scala/kantan/csv/HeaderEncoder.scala

@@ -23,7 +23,7 @@ trait HeaderEncoder[A] extends Serializable {
 
 object HeaderEncoder extends GeneratedHeaderEncoders {
   def apply[A](implicit ev: HeaderEncoder[A]): HeaderEncoder[A] =
-    macro imp.summon[HeaderEncoder[A]]
+    ev
 
   implicit def defaultHeaderEncoder[A: RowEncoder]: HeaderEncoder[A] =
     new HeaderEncoder[A] {