[JS IR] Remove redundant legacy property access property

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JSCompilerArguments.kt

@@ -148,9 +148,6 @@ class K2JSCompilerArguments : CommonCompilerArguments() {
     )
     var irModuleName: String? by NullableStringFreezableVar(null)
 
-    @Argument(value = "-Xir-legacy-property-access", description = "Force property access via JS properties (requires -Xir-export-all)")
-    var irLegacyPropertyAccess: Boolean by FreezableVar(false)
-
     @Argument(value = "-Xir-base-class-in-metadata", description = "Write base class into metadata")
     var irBaseClassInMetadata: Boolean by FreezableVar(false)
 

compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JsIrCompiler.kt

@@ -347,7 +347,6 @@ class K2JsIrCompiler : CLICompiler<K2JSCompilerArguments>() {
                 multiModule = arguments.irPerModule,
                 relativeRequirePath = true,
                 propertyLazyInitialization = arguments.irPropertyLazyInitialization,
-                legacyPropertyAccess = arguments.irLegacyPropertyAccess,
                 baseClassIntoMetadata = arguments.irBaseClassInMetadata,
                 safeExternalBoolean = arguments.irSafeExternalBoolean,
                 safeExternalBooleanDiagnostic = RuntimeDiagnostic.resolve(