Stabilize reflect paramVariance (#19268)

Author: smarter

library/src/scala/quoted/Quotes.scala

@@ -3295,7 +3295,6 @@ trait Quotes { self: runtime.QuoteUnpickler & runtime.QuoteMatching =>
          *
          *  Variance flags can be one of `Flags.{Covariant, Contravariant, EmptyFlags}`.
          */
-        @experimental
         def paramVariances: List[Flags]
       end extension
     end TypeLambdaMethods
@@ -4123,7 +4122,6 @@ trait Quotes { self: runtime.QuoteUnpickler & runtime.QuoteMatching =>
          *  Variance flags can be one of `Flags.{Covariant, Contravariant, EmptyFlags}`.
          *  If this is not the symbol of a type parameter the result is `Flags.EmptyFlags`.
          */
-        @experimental
         def paramVariance: Flags
 
         /** Signature of this definition */

tests/run-tasty-inspector/stdlibExperimentalDefinitions.scala

@@ -68,8 +68,6 @@ val experimentalDefinitionInLibrary = Set(
   "scala.annotation.init$.region",
 
    //// New APIs: Quotes
-  "scala.quoted.Quotes.reflectModule.TypeLambdaMethods.paramVariances",
-  "scala.quoted.Quotes.reflectModule.SymbolMethods.paramVariance",
   // Can be stabilized in 3.4.0 (unsure) or later
   "scala.quoted.Quotes.reflectModule.CompilationInfoModule.XmacroSettings",
   // Cant be stabilized yet.