[FIR] Update testdata after introducing FirResolvedErrorReference

compiler/testData/codegen/boxError/syntax/evaluationOrder.kt

@@ -1,6 +1,5 @@
 // IGNORE_ERRORS
 // ERROR_POLICY: SYNTAX
-// IGNORE_BACKEND_K2: JS_IR
 
 // MODULE: lib
 // FILE: t.kt
@@ -34,4 +33,4 @@ fun box(): String {
     } catch (e: IllegalStateException) {
         return if (storage == "abc") "OK" else "FAIL ABC"
     return "FAIL"
-}
+}