Remove LANGUAGE_VERSION from boxInline tests

compiler/testData/codegen/boxInline/defaultValues/lambdaInlining/receiverClashInClass2.kt

@@ -1,6 +1,5 @@
 // IGNORE_BACKEND: JVM_IR
 // FILE: 1.kt
-// LANGUAGE_VERSION: 1.2
 // SKIP_INLINE_CHECK_IN: inlineFun$default
 package test
 
@@ -24,4 +23,4 @@ fun String.test(): String = with(A("VALUE")) { "INLINE".inlineFun({ this@test })
 fun box(): String {
     val result = "TEST".test()
     return if (result == "VALUE INLINE TEST INLINE") "OK" else "fail 1: $result"
-}
+}