Remove LANGUAGE_VERSION from boxInline tests

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

@@ -1,6 +1,5 @@
 // IGNORE_BACKEND: JVM_IR
 // FILE: 1.kt
-// LANGUAGE_VERSION: 1.2
 // SKIP_INLINE_CHECK_IN: inlineFun$default
 package test
 
@@ -19,4 +18,4 @@ import test.*
 
 fun box(): String {
     return inlineFun(B("O")).value + inlineFun(A("K")).value
-}
+}