Apply suggestions from code review

Co-authored-by: Hamza Remmal <hamza@remmal.net>

Author: natsukagami

compiler/src/dotty/tools/dotc/transform/SyntheticMembers.scala

@@ -17,8 +17,6 @@ import util.Spans.Span
 import config.Printers.derive
 import NullOpsDecorator.*
 import scala.runtime.Statics
-import dotty.tools.dotc.config.Feature
-import dotty.tools.dotc.cc.CapturingType
 
 object SyntheticMembers {
 

library/src/scala/Tuple.scala

@@ -175,7 +175,7 @@ object Tuple {
     case h *: t => F[h, Fold[t, Z, F]]
 
   /** Converts a tuple `(T1, ..., Tn)` to `(F[T1], ..., F[Tn])` */
-  type Map[Tup <: Tuple, F <: [_ <: Union[Tup]] =>> Any] <: Tuple = Tup match {
+  type Map[Tup <: Tuple, F[_ <: Union[Tup]]] <: Tuple = Tup match {
     case EmptyTuple => EmptyTuple
     case h *: t => F[h] *: Map[t, F]
   }

project/Build.scala

@@ -1080,7 +1080,6 @@ object Build {
       // NOTE: Do not use `sourceDirectories` since `sources` are currently pinned until `3.8.0`
       "-sourcepath", (Compile / sources).value.map(_.getCanonicalPath).distinct.mkString(File.pathSeparator),
       "-Yexplicit-nulls",
-      "-explain",
     ),
     (Compile / doc / scalacOptions) ++= ScaladocConfigs.DefaultGenerationSettings.value.settings,
     (Compile / packageSrc / mappings) ++= {