Mute/unmute JVM backend tests for language version 1.4

compiler/testData/codegen/box/javaInterop/genericSamProjectedOutWithNewInference.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +NewInference
 // IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND: JVM_IR
 
 // FILE: example/Hello.java
 
@@ -77,4 +76,4 @@ fun box(): String {
     if (result != "OK") return "fail 5: $result"
 
     return "OK"
-}
+}