[KLIB] Deprecate -Xexpect-actual-linker CLI argument

This argument has been finally superseded by `-Xmetadata-klib`.

^KT-61136

compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArgumentsCopyGenerated.kt

@@ -32,7 +32,6 @@ fun copyCommonCompilerArguments(from: CommonCompilerArguments, to: CommonCompile
     to.enableBuilderInference = from.enableBuilderInference
     to.enableSignatureClashChecks = from.enableSignatureClashChecks
     to.expectActualClasses = from.expectActualClasses
-    to.expectActualLinker = from.expectActualLinker
     to.experimental = from.experimental?.copyOf()
     to.explicitApi = from.explicitApi
     to.extendedCompilerChecks = from.extendedCompilerChecks

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt

@@ -574,7 +574,8 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
 
     @Argument(
         value = "-Xmetadata-klib",
-        description = "Produce a klib that only contains the declarations metadata"
+        description = "Produce a klib that only contains the declarations metadata",
+        deprecatedName = "-Xexpect-actual-linker"
     )
     var metadataKlib: Boolean = false
         set(value) {
@@ -582,17 +583,6 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
             field = value
         }
 
-    /** TODO: replace by [metadataKlib] */
-    @Argument(
-        value = "-Xexpect-actual-linker",
-        description = "Enable experimental expect/actual linker"
-    )
-    var expectActualLinker = false
-        set(value) {
-            checkFrozen()
-            field = value
-        }
-
     @Argument(value = "-Xdisable-default-scripting-plugin", description = "Do not enable scripting plugin by default")
     var disableDefaultScriptingPlugin = false
         set(value) {
@@ -818,7 +808,7 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
                 )
             }
             put(AnalysisFlags.optIn, useExperimentalFqNames + optIn?.toList().orEmpty())
-            put(AnalysisFlags.skipExpectedActualDeclarationChecker, expectActualLinker || metadataKlib) // TODO (KT-61136): drop `expectActualLinker` later, after the appropriate changes in the Gradle plugin
+            put(AnalysisFlags.skipExpectedActualDeclarationChecker, metadataKlib)
             put(AnalysisFlags.explicitApiVersion, apiVersion != null)
             put(AnalysisFlags.allowResultReturnType, allowResultReturnType)
             ExplicitApiMode.fromString(explicitApi)?.also { put(AnalysisFlags.explicitApiMode, it) } ?: collector.report(

compiler/cli/src/org/jetbrains/kotlin/cli/common/arguments.kt

@@ -28,7 +28,6 @@ fun CompilerConfiguration.setupCommonArguments(
 
     put(CommonConfigurationKeys.DISABLE_INLINE, arguments.noInline)
     put(CommonConfigurationKeys.USE_FIR_EXTENDED_CHECKERS, arguments.useFirExtendedCheckers)
-    put(CommonConfigurationKeys.EXPECT_ACTUAL_LINKER, arguments.expectActualLinker)
     put(CommonConfigurationKeys.METADATA_KLIB, arguments.metadataKlib)
     putIfNotNull(CLIConfigurationKeys.INTELLIJ_PLUGIN_ROOT, arguments.intellijPluginRoot)
     put(CommonConfigurationKeys.REPORT_OUTPUT_FILES, arguments.reportOutputFiles)

compiler/cli/src/org/jetbrains/kotlin/cli/metadata/K2MetadataCompiler.kt

@@ -101,8 +101,7 @@ class K2MetadataCompiler : CLICompiler<K2MetadataCompilerArguments>() {
         val environment =
             KotlinCoreEnvironment.createForProduction(rootDisposable, configuration, EnvironmentConfigFiles.METADATA_CONFIG_FILES)
 
-        // TODO (KT-61136): drop `expectActualLinker` later, after the appropriate changes in the Gradle plugin
-        val mode = if (arguments.expectActualLinker || arguments.metadataKlib) "KLib" else "metadata"
+        val mode = if (arguments.metadataKlib) "KLib" else "metadata"
 
         val sourceFiles = environment.getSourceFiles()
         performanceManager.notifyCompilerInitialized(sourceFiles.size, environment.countLinesOfCode(sourceFiles), "$mode mode for $moduleName module")
@@ -121,8 +120,7 @@ class K2MetadataCompiler : CLICompiler<K2MetadataCompilerArguments>() {
             val useFir = configuration.getBoolean(CommonConfigurationKeys.USE_FIR)
             val metadataSerializer = when {
                 useFir -> FirMetadataSerializer(configuration, environment)
-                // TODO (KT-61136): drop `expectActualLinker` later, after the appropriate changes in the Gradle plugin
-                arguments.expectActualLinker || arguments.metadataKlib -> K2MetadataKlibSerializer(configuration, environment)
+                arguments.metadataKlib -> K2MetadataKlibSerializer(configuration, environment)
                 else -> MetadataSerializer(configuration, environment, dependOnOldBuiltIns = true)
             }
             metadataSerializer.analyzeAndSerialize()