Unmute ir-tests after CR support

compiler/testData/codegen/box/functions/localFunctions/definedWithinLambdaInnerUsage2.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 // WITH_RUNTIME
 
 import kotlin.test.assertEquals

compiler/testData/codegen/box/functions/localFunctions/kt4119.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 fun foo(f: (Int?) -> Int): Int {
     return f(0)
 }

compiler/testData/codegen/box/functions/localFunctions/kt4514.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 fun box(): String {
     fun String.f() = this
     val vf: String.() -> String = { this }