Make caps.Capability non-experimental

Author: natsukagami

compiler/src/dotty/tools/dotc/core/Definitions.scala

@@ -2091,7 +2091,6 @@ class Definitions {
    */
   @tu lazy val ccExperimental: Set[Symbol] = Set(
     CapsModule, CapsModule.moduleClass, PureClass,
-    Caps_Capability, // TODO: Remove when Capability is stabilized
     RequiresCapabilityAnnot,
     captureRoot, Caps_CapSet, Caps_ContainsTrait, Caps_ContainsModule, Caps_ContainsModule.moduleClass, UseAnnot,
     Caps_Mutable, Caps_SharedCapability, ConsumeAnnot,

library/src/scala/caps/package.scala

@@ -22,7 +22,6 @@ import annotation.{experimental, compileTimeOnly, retainsCap}
  * But even without capture checking, extending this trait can be useful for documenting the intended purpose
  * of a class.
  */
-@experimental
 trait Capability extends Any
 
 /** The universal capture reference. */

tests/run-tasty-inspector/stdlibExperimentalDefinitions.scala

@@ -32,7 +32,6 @@ val experimentalDefinitionInLibrary = Set(
   "scala.annotation.retainsCap",
   "scala.Pure",
   "scala.caps.CapSet",
-  "scala.caps.Capability",
   "scala.caps.Contains",
   "scala.caps.Contains$",
   "scala.caps.Contains$.containsImpl",