diff --git a/internal/util-cache/src/main/scala/sbt/internal/util/AdditionalFormats.scala b/internal/util-cache/src/main/scala/sbt/internal/util/AdditionalFormats.scala
deleted file mode 100644
index 8008cf90a..000000000
--- a/internal/util-cache/src/main/scala/sbt/internal/util/AdditionalFormats.scala
+++ /dev/null
@@ -1,71 +0,0 @@
-package sbt.internal.util
-
-import sbt.internal.util.Types.:+:
-
-import sjsonnew.{ Builder, deserializationError, JsonFormat, Unbuilder }
-import sjsonnew.BasicJsonProtocol, BasicJsonProtocol.asSingleton
-
-import java.io.{ ByteArrayInputStream, ByteArrayOutputStream, File, InputStream, OutputStream }
-
-import java.net.{ URI, URL }
-
-trait URIFormat { self: BasicJsonProtocol =>
-  implicit def URIFormat: JsonFormat[URI] = project(_.toString, new URI(_: String))
-}
-
-trait URLFormat { self: BasicJsonProtocol =>
-  implicit def URLFormat: JsonFormat[URL] = project(_.toString, new URL(_: String))
-}
-
-trait FileFormat { self: BasicJsonProtocol =>
-  implicit def FileFormat: JsonFormat[File] = project(_.toString, new File(_: String))
-}
-
-trait SetFormat { self: BasicJsonProtocol =>
-  implicit def SetFormat[T: JsonFormat]: JsonFormat[Set[T]] = project(_.toSeq, (_: Seq[T]).toSet)
-}
-
-trait HListFormat {
-  implicit def HConsFormat[H: JsonFormat, T <: HList: JsonFormat]: JsonFormat[H :+: T] =
-    new JsonFormat[H :+: T] {
-      override def read[J](jsOpt: Option[J], unbuilder: Unbuilder[J]): H :+: T =
-        jsOpt match {
-          case Some(js) =>
-            unbuilder.beginObject(js)
-            val h = unbuilder.readField[H]("h")
-            val t = unbuilder.readField[T]("t")
-            unbuilder.endObject()
-
-            HCons(h, t)
-
-          case None =>
-            deserializationError("Expect JValue but found None")
-        }
-
-      override def write[J](obj: H :+: T, builder: Builder[J]): Unit = {
-        builder.beginObject()
-        builder.addField("h", obj.head)
-        builder.addField("t", obj.tail)
-        builder.endObject()
-      }
-    }
-
-  implicit val HNilFormat: JsonFormat[HNil] = asSingleton(HNil)
-
-}
-
-trait StreamFormat { self: BasicJsonProtocol =>
-  def streamFormat[T](write: (T, OutputStream) => Unit, read: InputStream => T): JsonFormat[T] = {
-    lazy val byteArrayFormat = implicitly[JsonFormat[Array[Byte]]]
-    val toBytes = (t: T) => { val bos = new ByteArrayOutputStream(); write(t, bos); bos.toByteArray }
-    val fromBytes = (bs: Array[Byte]) => read(new ByteArrayInputStream(bs))
-
-    new JsonFormat[T] {
-      override def read[J](jsOpt: Option[J], unbuilder: Unbuilder[J]): T =
-        fromBytes(byteArrayFormat.read(jsOpt, unbuilder))
-
-      override def write[J](obj: T, builder: Builder[J]): Unit =
-        byteArrayFormat.write(toBytes(obj), builder)
-    }
-  }
-}
diff --git a/internal/util-cache/src/main/scala/sbt/internal/util/CacheImplicits.scala b/internal/util-cache/src/main/scala/sbt/internal/util/CacheImplicits.scala
index 0ebdf134b..78e6e301c 100644
--- a/internal/util-cache/src/main/scala/sbt/internal/util/CacheImplicits.scala
+++ b/internal/util-cache/src/main/scala/sbt/internal/util/CacheImplicits.scala
@@ -4,8 +4,3 @@ import sjsonnew.BasicJsonProtocol
 
 object CacheImplicits extends BasicCacheImplicits
   with BasicJsonProtocol
-  with FileFormat
-  with HListFormat
-  with URIFormat
-  with URLFormat
-  with StreamFormat