Remove no-op -Yno-experimental

Author: nicolasstucki

compiler/src/dotty/tools/dotc/config/ScalaSettings.scala

@@ -406,7 +406,6 @@ private sealed trait YSettings:
   val YretainTrees: Setting[Boolean] = BooleanSetting(ForkSetting, "Yretain-trees", "Retain trees for top-level classes, accessible from ClassSymbol#tree")
   val YshowTreeIds: Setting[Boolean] = BooleanSetting(ForkSetting, "Yshow-tree-ids", "Uniquely tag all tree nodes in debugging output.")
   val YfromTastyIgnoreList: Setting[List[String]] = MultiStringSetting(ForkSetting, "Yfrom-tasty-ignore-list", "file", "List of `tasty` files in jar files that will not be loaded when using -from-tasty.")
-  val YnoExperimental: Setting[Boolean] = BooleanSetting(ForkSetting, "Yno-experimental", "Disable experimental language features by default in NIGHTLY/SNAPSHOT versions of the compiler (deprecated, no-op).")
   val YlegacyLazyVals: Setting[Boolean] = BooleanSetting(ForkSetting, "Ylegacy-lazy-vals", "Use legacy (pre 3.3.0) implementation of lazy vals.")
   val YcompileScala2Library: Setting[Boolean] = BooleanSetting(ForkSetting, "Ycompile-scala2-library", "Used when compiling the Scala 2 standard library.")
   val YoutputOnlyTasty: Setting[Boolean] = BooleanSetting(ForkSetting, "Youtput-only-tasty", "Used to only generate the TASTy file without the classfiles")

project/Build.scala

@@ -1083,7 +1083,6 @@ object Build {
       Compile / doc / scalacOptions += "-Ydocument-synthetic-types",
       scalacOptions += "-Ycompile-scala2-library",
       scalacOptions += "-Yscala2Unpickler:never",
-      scalacOptions += "-Yno-experimental",
       scalacOptions -= "-Xfatal-warnings",
       Compile / compile / logLevel.withRank(KeyRanks.Invisible) := Level.Error,
       ivyConfigurations += SourceDeps.hide,
@@ -2173,9 +2172,6 @@ object Build {
           settings(
             versionScheme := Some("semver-spec"),
             libraryDependencies += "org.scala-lang" % "scala-library" % stdlibVersion,
-            // Make sure we do not refer to experimental features outside an experimental scope.
-            // In other words, disable NIGHTLY/SNAPSHOT experimental scope.
-            scalacOptions += "-Yno-experimental",
           ).
           settings(dottyLibrarySettings)
       if (mode == Bootstrapped) {

tests/init-global/pos/global-region1.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 import scala.annotation.init.region
 

tests/init-global/warn/i18628_3.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 import scala.annotation.init.widen
 

tests/neg-macros/i18677-a/Macro_1.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 import annotation.MacroAnnotation
 import quoted.*

tests/neg-macros/i18677-a/Test_2.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 @extendFoo
 class AFoo // error

tests/neg-macros/i18677-b/Macro_1.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 import annotation.MacroAnnotation
 import quoted.*

tests/neg-macros/i18677-b/Test_2.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 @extendFoo
 class AFoo // error

tests/neg-macros/i19676/Macro_1.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 import scala.annotation.MacroAnnotation
 import scala.quoted.*

tests/neg-macros/i19676/Test_2.scala

@@ -1,4 +1,4 @@
-//> using options -experimental -Yno-experimental
+//> using options -experimental
 
 @buggy // error
 case class Foo()