FIR: Unmute passing blackbox tests

compiler/testData/codegen/box/specialBuiltins/enumAsOrdinaled.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface Ordinaled {
     val ordinal: Int
 }
@@ -14,4 +13,4 @@ fun box(): String {
     if (result != 0) return "fail 1: $result"
 
     return "OK"
-}
+}