Drop all tests that disable features for language version less than 3

compiler/testData/codegen/box/constants/kt9532_lv10.kt

@@ -1,38 +0,0 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// !LANGUAGE: -InlineConstVals
-// IGNORE_BACKEND: JS_IR, NATIVE
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
-object A {
-    const val a: String = "$"
-    const val b = "1234$a"
-    const val c = 10000
-
-    val bNonConst = "1234$a"
-    val bNullable: String? = "1234$a"
-}
-
-object B {
-    const val a: String = "$"
-    const val b = "1234$a"
-    const val c = 10000
-
-    val bNonConst = "1234$a"
-    val bNullable: String? = "1234$a"
-}
-
-fun box(): String {
-    if (A.a !== B.a) return "Fail 1: A.a !== B.a"
-
-    if (A.b !== B.b) return "Fail 2: A.b !== B.b"
-
-    if (A.c !== B.c) return "Fail 3: A.c !== B.c"
-
-    if (A.bNonConst === B.bNonConst) return "Fail 4: A.bNonConst === B.bNonConst"
-    if (A.bNullable === B.bNullable) return "Fail 5: A.bNullable === B.bNullable"
-
-    return "OK"
-}

compiler/testData/codegen/box/delegation/simple1.0.kt

@@ -1,27 +0,0 @@
-// !LANGUAGE: -NoDelegationToJavaDefaultInterfaceMembers
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: don't support legacy feature
-// TARGET_BACKEND: JVM
-// JVM_TARGET: 1.8
-// FILE: Base.java
-
-public interface Base {
-    String getValue();
-
-    default String test() {
-        return getValue();
-    }
-}
-
-// FILE: main.kt
-
-class OK : Base {
-    override fun getValue() = "OK"
-}
-
-fun box(): String {
-    val z = object : Base by OK() {
-        override fun getValue() = "Fail"
-    }
-    return z.test()
-}

compiler/testData/codegen/box/jdk/streamBackwardCompatibility.kt

@@ -1,11 +0,0 @@
-// !LANGUAGE: -AdditionalBuiltInsMembers
-// SKIP_JDK6
-// TARGET_BACKEND: JVM
-// WITH_STDLIB
-// FULL_JDK
-
-class A(val x: List<String>) : List<String> by x
-
-fun box(): String {
-    return A(listOf("OK"))[0]
-}