KT-53778 Remove experimental annotations from open ranges

generators/builtins/ranges.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
 package org.jetbrains.kotlin.generators.builtins.ranges
@@ -54,14 +43,13 @@ class GenerateRanges(out: PrintWriter) : BuiltInsSourceGenerator(out) {
 """/**
  * A range of values of type `$t`.
  */
-@OptIn(ExperimentalStdlibApi::class)
 public class $range(start: $t, endInclusive: $t) : ${t}Progression(start, endInclusive, $increment), ClosedRange<$t>, OpenEndRange<$t> {
     override val start: $t get() = first
     override val endInclusive: $t get() = last
     
     @Deprecated("Can throw an exception when it's impossible to represent the value with $t type, for example, when the range includes MAX_VALUE. It's recommended to use 'endInclusive' property that doesn't throw.")
-    @SinceKotlin("1.7")
-    @ExperimentalStdlibApi
+    @SinceKotlin("1.9")
+    @WasExperimental(ExperimentalStdlibApi::class)
     override val endExclusive: $t get() {
         if (last == $t.MAX_VALUE) error("Cannot return the exclusive upper bound of a range that includes MAX_VALUE.")
         return last + 1