Remove LANGUAGE_VERSION from non-coroutine codegen tests

Most of these tests used this directive as a way to opt in to a new
language feature, and most of those features are already stable for a
long time, so no opt-in is needed. Some other tests used the directive
to opt out from a language feature, replace those by the `LANGUAGE`
directive. One test used the directive to test behavior that actually
depended on the API version; use `API_VERSION` directive there instead.

compiler/testData/codegen/box/collectionLiterals/defaultAnnotationParameterValues.kt

@@ -1,6 +1,5 @@
 // IGNORE_BACKEND: JVM_IR
 // IGNORE_BACKEND: JS_IR
-// LANGUAGE_VERSION: 1.2
 // WITH_REFLECT
 
 // IGNORE_BACKEND: JS
@@ -39,4 +38,4 @@ fun box(): String {
         check(e.contentEquals(doubleArrayOf(1.0)), "Fail 5: ${e.joinToString()}")
         "OK"
     }
-}
+}